- 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
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