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  1. Roadside bird counts on BLM lands in Petroleum and Fergus counties, Montana / submitted by Paul Hendricks; a report to Bureau of Land Management, Lewistown Field Office.
    By: Hendricks, P. - Montana Natural Heritage Program. - United States.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,c2000.
    Contributed by: Montana State Library (archive.org)
    Subjects: Baird's sparrow  Bird surveys  Birds  Brewer's sparrow  Brown-headed cowbird  Counting  Fergus County  Geographical distribution  Grasshopper sparrow  Grassland birds  Lark bunting  Long-billed curlew  Montana  Musselshell River (Mont.)  Petroleum County  Ponderosa pine  Roadside transect  Sage thrasher  Sagebrush  Savannah sparrow  Short-eared owl  Sprague's pipit  Upland sandpiper  Vesper sparrow  Western meadowlark  
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  2. Techniques for shipboard surveys of marine birds / by Patrick J. Gould and Douglas J. Forsell.
    By: Gould, Patrick J. - Forsell, Douglas J. - U.S. Fish and Wildlife Service.
    Publication info: Springfield, VA :National Technical Information Service [distributor],1989.
    Contributed by: Prelinger Library (archive.org)
    Subjects: Bird populations  Counting  Estimates  Sea birds  
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