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  1. By: Illinois. Dept. of Energy and Natural Resources. - Critical Trends Assessment Project.
    Publication info: Springfield, Ill, Ill. Dept. of Energy and Natural Resources, 1994
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Illinois. Dept. of Natural Resources. Office of Scientific Research and Analysis. - Critical Trends Assessment Project. - Illinois State Geological Survey. - Illinois. Dept. of Natural Resources.
    Publication info: Springfield, Ill, Illinois Dept. of Natural Resources, 1998-
    Holding Institution: University Library, University of Illinois Urbana Champaign
  3. By: Illinois. Division of Energy and Environmental Assessment. - Critical Trends Assessment Project. - Illinois RiverWatch Network.
    Edition: 3rd ed.
    Publication info: Springfield, Ill, Illinois Dept. of Natural Resources, Office of Realty and Environmental Planning, Division of Energy and Environmental Assessment, [1998]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  4. By: Illinois. Dept. of Natural Resources. - Illinois. Office of Realty and Environmental Planning. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: Springfield, Ill, Illinois Dept. of Natural Resources, 2002
    Holding Institution: University Library, University of Illinois Urbana Champaign
  5. By: Illinois. Dept. of Energy and Natural Resources. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: [Illinois], Illinois Dept. of Energy and Natural Resources, Office of Realty and Environmental Palnning, 2002
    Holding Institution: University Library, University of Illinois Urbana Champaign
  6. By: Illinois. Dept. of Energy and Natural Resources. - Illinois. Natural History Survey Division - Critical Trends Assessment Project.
    Publication info: [Illinois], Illinois Dept. of Natural Resources, Office of Realty and Environmental Palnning, Dec. 2004
    Holding Institution: University Library, University of Illinois Urbana Champaign