Young, J. Z. The life of vertebrates. - 2d ed. - New York Oxford University Press 1962. - 820 p. illus. 25 cm. LCCN: 62021012 /L/r85 Subjects--Topical Terms: VertebratesVertebrates, Fossil LC Class. No.: QL605 / .Y68 1962 Dewey Class. No.: 596