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  1. Abundance and distribution of bats in the Pryor Mountains of south central Montana / David J. Worthington and H. Nelson Ross.
    By: Worthington, David J. - Ross, H. Nelson. - Custer National Forest (Agency : U.S.) - Montana Natural Heritage Program. - Montana Nature Conservancy. - United States. - University of Montana--Missoula.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,[1990]
    Contributed by: Montana State Library (archive.org)
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  2. Abundance and distribution of bats in the Pryor Mountains of south central Montana and north eastern Wyoming / David J. Worthington for the Montana Natural Heritage Program, Bureau of Land Management-Billings Resource Area, [and] Custer National Forest.
    By: Worthington, David J. - Custer National Forest (Agency : U.S.) - Montana Natural Heritage Program. - United States. - University of Montana--Missoula.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,c1991.
    Contributed by: Montana State Library (archive.org)
    View Book