Biodiversity Heritage Library
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By "Exxon Company U.S.A. "
Response of elk to Exxon's field development in the Riley Ridge area of western Wyoming, 1979-1990 /
By: Exxon Company U.S.A. - Hayden-Wing Associates. - Wyoming.
Publication info: Sheridan, Wyo. : Hayden-Wing Associates, 
Contributed by: Bureau of Land Management (archive.org)