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By "Walker, Ernest P. (Born - 1891)"
The birds of Wyoming, with an explanation of recent changes in their distribution; economic aspect also considered. By B. H. Grave and Ernest P. Walker.
By: Grave, Benjamin Harrison, - Walker, Ernest P.
Publication info: [Laramie]University of Wyoming,1913.
Contributed by: MBLWHOI Library, Woods Hole
BHL Collections: MBLWHOI Library, Woods Hole