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  1. By: Welsh, Stanley L, - Thorne, K H - United States. Bureau of Land Management. - United States. Fish and Wildlife Service. - United States. Forest Service. - United States. Forest Service. Branch of Range and Wildlife Habitat Ecology and Management.
    Publication info: Denver, Colorado : 1979.
    Holding Institution: Bureau of Land Management (archive.org)
  2. By: Behnke, Robert J. - United States. Bureau of Land Management. - United States. Fish and Wildlife Service. - United States. Forest Service.
    Publication info: [Lakewood, Colo.?] :Forest Service, U.S. Dept. of Agriculture,1979.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library