Andrews, Roy Chapman. "Explorations in Mongolia: A Review of the Central Asiatic Expeditions of the American Museum of Natural History." The Geographical Journal 69/1 (January 1927): 1-19.

Andrews, Roy Chapman. "Explorations in Mongolia: A Review of the Central Asiatic Expeditions of the American Museum of Natural History." The Geographical Journal 69/1 (January 1927): 1-19.