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  1. Algae of the Tongue River system, Montana and Wyoming /
    By: Bahls, Loren L. - Bahls, P. A. - Montana.
    Publication info: Helena, Mont. :L. and P. Bahls,1977.
    Contributed by: Montana State Library (archive.org)
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  2. Biological integrity in Box Elder Creek based on periphyton composition and community structure / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  3. Biological integrity of Antelope Creek and Potter Creek based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  4. Biological integrity of Bear Creek, Park County , Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  5. Biological integrity of Beaver Creek in the Big Spring Creek TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  6. Biological integrity of Beaver Creek in the Upper Madison River TMDL planning area based on the structure and composition of the benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
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  7. Biological integrity of Big Dry Creek and Little Dry Creek Garfield County, Montana based on the composition and structure of the Benthic algae community / prepared for Garfield County Conservation District; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  8. Biological integrity of Big Dry Creek based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  9. Biological integrity of Billman Creek, Park County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  10. Biological integrity of Careless Creek based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  11. Biological integrity of Casino Creek, Fergus County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  12. Biological integrity of Chicago Gulch and Collar Gulch based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  13. Biological integrity of Cottonwood Creek and Rock Creek near Clyde Park, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  14. Biological integrity of Cottonwood Creek, Fergus County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  15. Biological integrity of Dog Creek and Eagle Creek based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
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  16. Biological integrity of Eagle Creek based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  17. Biological integrity of East Rosebud Creek based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  18. Biological integrity of Hughes Creek in the Bitterroot River TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  19. Biological integrity of Jackson Creek, Jennies Fork, and Granite Creek in the Lake Helena TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
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  20. Biological integrity of Lake Creek (Benton Lake watershed) based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  21. Biological integrity of Little Dry Creek based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  22. Biological integrity of Logan Creek (Flathead-Stillwater TMDL planning area) based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  23. Biological integrity of Mill Creek, Pine Creek and Tom Miner Creek based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  24. Biological integrity of Mol Heron Creek, Park County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  25. Biological integrity of O'Fallon Creek and selected tributaries of O'Fallon Creek based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  26. Biological integrity of Prairie Elk Creek and Sand Creek based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  27. Biological integrity of Spring Creek, Teton County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  28. Biological integrity of Squirrel Creek, Big Horn County based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  29. Biological integrity of streams in McCone County, Montana based on the structure and composition of the Benthic algae community / prepared for McCone County Conservation District and State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - McCone County Conservation District. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  30. Biological integrity of streams in the Big Hole River TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
    View Book
  31. Biological integrity of streams in the Bitterroot River TMDL planning area based on the structure and composition of the benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
    View Book
  32. Biological integrity of streams in the Blackfoot River TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
    View Book
  33. Biological integrity of streams in the Cut Bank - Two Medicine TMDL planning area based on the structure and composition of the benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
    View Book
  34. Biological integrity of streams in the Dearborn River TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
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  35. Biological integrity of streams in the Madison River TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  36. Biological integrity of streams in the Ninemile Creek TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
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  37. Biological integrity of streams in the Redwater River TMDL planning area (HUC 10060002) based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
    View Book
  38. Biological integrity of streams in the Ruby River TMDL planning area based on the structure and composition of the benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
    View Book
  39. Biological integrity of Sullivan Creek and Skyland Creek in the Upper Flathead River TMDL planning area based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
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  40. Biological integrity of the East Boulder River based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
    View Book
  41. Biological integrity of the Judith River, Fergus County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
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  42. Biological integrity of the Redwater River in the vicinity of Circle, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2000.
    Contributed by: Montana State Library (archive.org)
    View Book
  43. Biological integrity of the Shields River near Wilsall, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  44. Biological integrity of the Upper Stillwater River based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  45. Biological integrity of the Yaak River and the West Fork Yaak River based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2004.
    Contributed by: Montana State Library (archive.org)
    View Book
  46. Biological integrity of tributaries to the Swan River based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2003.
    Contributed by: Montana State Library (archive.org)
    View Book
  47. Biological integrity of Ward Creek, Powell County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Montana Dept. of Environmental Quality,2001.
    Contributed by: Montana State Library (archive.org)
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  48. A comparison of the benthic diatom associations inhabiting the MPC Colstrip Units 3 & 4 effluent holding ponds with those in Cow Creek, Rosebud County, Montana during June 1985 /
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :Water Quality Bureau, Environmental Sciences Division, Dept. of Health and Environmental Sciences,[1985]
    Contributed by: Montana State Library (archive.org)
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  49. Data report for the benthic macroinvertebrate and periphyton community inventory of streams draining the southern Fort Union coalfield region of southeastern Montana /
    By: Klarich, Duane A. - Bahls, Loren L. - Regele, Stephen M. - Geological Survey (U.S.) - Montana. - United States.
    Publication info: Billings, Mont. :Water Quality Bureau, Billings Regional Office, Environmental Sciences Division, Montana Dept. of Health and Environmental Sciences,[1980]
    Contributed by: Montana State Library (archive.org)
    View Book
  50. The effects of Muddy Creek on the biology of the lower Sun River /
    By: Ingman, Gary L. - Bahls, Loren L. - Weber, Erich E. - Cascade County Conservation District. - Montana. - Muddy Creek Special Water Quality Project. - Teton County Conservation District.
    Publication info: Helena, Mont. (Cogswell Building, Helena 59620) :Water Quality Bureau, Montana Department of Health and Environmental Sciences,[1984]
    Contributed by: Montana State Library (archive.org)
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  51. Effects of an oil spill on the composition and structure of the periphyton community in Casino Creek and Big Spring Creek near Lewistown, Montana / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],1999.
    Contributed by: Montana State Library (archive.org)
    View Book
  52. Ground water seepage and its effects on saline soils / by Loren L. Bahls and Marvin R. Miller.
    By: Bahls, Loren L. - Miller, Marvin R.
    Publication info: Bozeman :Montana University Joint Water Resources Research Center, Montana State University,1975.
    Contributed by: Montana State Library (archive.org)
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  53. Lake water quality assessment and contaminant monitoring of fishes and sediments from Montana waters : final report to U.S. Environmental Protection Agency /
    By: Phillips, Glenn R. - Bahls, Loren L. - United States.
    Publication info: Helena :Montana Dept. of Fish, Wildlife and Parks?,[1994]
    Contributed by: Montana State Library (archive.org)
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  54. Microflora of the Yellowstone River / Loren L. Bahls.
    By: Bahls, Loren L. - Montana Environmental Quality Council.
    Publication info: Helena, Mont. :Environmental Quality Council, [etc.],1974-
    Contributed by: Montana State Library (archive.org)
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  55. A supplemental assessment of use support in the Teton River based on periphyton composition and community structure / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],1999.
    Contributed by: Montana State Library (archive.org)
    View Book
  56. Support of aquatic life uses in Big Spring Creek, Fergus County, Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],2001.
    Contributed by: Montana State Library (archive.org)
    View Book
  57. Support of aquatic life uses in Careless Creek, Lodgepole Creeek, [sic] and the South Fork of Lodgepole Creek based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],2000.
    Contributed by: Montana State Library (archive.org)
    View Book
  58. Support of aquatic life uses in McDonald Creek and the Teton River based on periphyton composition and community structure / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],1999.
    Contributed by: Montana State Library (archive.org)
    View Book
  59. Support of aquatic life uses in Mizpah Creek based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],2001.
    Contributed by: Montana State Library (archive.org)
    View Book
  60. Support of aquatic life uses in Painted Robe Creek based on periphyton composition and community structure / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],1999.
    Contributed by: Montana State Library (archive.org)
    View Book
  61. Support of aquatic life uses in the Redwater River based on the periphyton composition and community structure / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],2001.
    Contributed by: Montana State Library (archive.org)
    View Book
  62. Support of aquatic life uses in the Shields River based on the structure and composition of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],2004.
    Contributed by: Montana State Library (archive.org)
    View Book
  63. Support of aquatic life uses in the Tongue River of southeastern Montana based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],2001.
    Contributed by: Montana State Library (archive.org)
    View Book
  64. Support of aquatic life uses in the Upper Blackfoot River and tributaries based on the composition and structure of the Benthic algae community / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],2001.
    Contributed by: Montana State Library (archive.org)
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  65. Support of aquatic life uses in the Upper Boulder River (Yellowstone River drainage) based on Diatom species composition and Diatom association metrics / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],1999.
    Contributed by: Montana State Library (archive.org)
    View Book
  66. Use support in Big Spring Creek based on periphyton composition and community structure / prepared for State of Montana Department of Environmental Quality ; prepared by Loren L. Bahls.
    By: Bahls, Loren L. - Montana.
    Publication info: Helena, Mont. :[Montana Dept. of Environmental Quality],1999.
    Contributed by: Montana State Library (archive.org)
    View Book