Turtles of the World: Expedition of the California Academy of Sciences to the Galápagos Islands, 1905-1906. I. Preliminary descriptions of four new races of gigantic land tortoises from the Galápagos Islands. Proc. California Acad. Sci. 1: 1-6.

Authors(s)	Van Denburgh, J.
Year	1907
Title	Expedition of the California Academy of Sciences to the Galápagos Islands, 1905-1906. I. Preliminary descriptions of four new races of gigantic land tortoises from the Galápagos Islands. Proc. California Acad. Sci. 1: 1-6.