Turtles of the World: The sidenecked turtle family Chelidae: a theory of relationships using shared derived characters. Amer. Mus. Novitates (2620): 1-28.

Literature

Authors(s)	Gaffney, E. S.
Year	1977
Title	The sidenecked turtle family Chelidae: a theory of relationships using shared derived characters. Amer. Mus. Novitates (2620): 1-28.