Turtles of the World: Bibliography of the North American land tortoises (Genus Gopherus). U. S. Fish and Wildlife Serv. Spl. Sci. Rept. Wildlife (190): 1-60.

Literature

Authors(s)	Douglass, J. F.
Year	1975
Title	Bibliography of the North American land tortoises (Genus Gopherus). U. S. Fish and Wildlife Serv. Spl. Sci. Rept. Wildlife (190): 1-60.