Most Popular Books
- The Chicago Academy of Sciences Arizona Expedition, April-June, 1937
- The rattlesnakes, genera Sistrurus and Crotalus: A study in zoogeography and evolution (Facsimile reprints in herpetology)
- Studies on the Breeding Habits and Young of the Copperhead, Agkistrodon Mokasen Beauvois, With Some Observations on Ovoviviparity