Ferruginous hawk (Buteo regalis) inventories on the Dillon Resource Area of southwest Montana; 1992 /
Atkinson, Eric C.
Montana Natural Heritage Program.
United States. Bureau of Land Management.
United States. Bureau of Land Management. Dillon Resource Area.
Helena, MT :Montana Natural Heritage Program,
Some abridged editions may exist with an incomplete appendix C (completed ECODATA forms).
Title from cover.
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