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  1. Sensitive plant species survey, Ashland District, Custer National Forest, Powder River and Rosebud Counties, Montana / by Bonnie L. Heidel and Hollis Marriott ; for Custer National Forest.
    By: Heidel, Bonnie L. - Marriott, Hollis. - Custer National Forest (Mont. and S.D.) - Montana Natural Heritage Program.
    Publication info: Helena, MT :Montana Natural Heritage Program,[1996]
    Contributed by: Montana State Library (archive.org)
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