BIBLIOGRAPHY
Animal Life in Yellowstone National Park—Vernon Bailey Yellowstone Information Manual—Fauna—Compiled by Dorr Yeager Lives of Game Animals—E. T. Seton Field Book of North American Mammals—H. E. Anthony Meeting the Mammals—Victor H. Cahalane A Field Guide to the Mammals—W. H. Burt and R. P. Grossenheider How to Know the Mammals—E. S. Booth