LITERATURE CITED
Reading edition
Davis, William B.
1939. The Recent mammals of Idaho. The Caxton Printers, Caldwell, Idaho, 400 pp., 2 full page half-tones, 33 figs. in text, April 5, 1939.
Presnall, C. C.
1938. Mammals of Zion-Bryce and Cedar Breaks. Zion-Bryce Mus. Bull., 2:1-20, January, 1938.
Warren, Edward R. and Hall, E. Raymond.
1939. A new subspecies of beaver from Colorado. Journ. Mamm., 20:358-362, 1 map, August 14, 1939.