Storer, Tracy I. 1889-1973 Elements of zoology [by] Tracy I. Storer, Robert L. Usinger [and] James W. Nybakken. - 3d ed. - New York, McGraw-Hill [1968] - viii, 493 p. illus. (part col.) 24 cm. LCCN: 68021852 Subjects--Topical Terms: Zoology. LC Class. No.: QL47 / .S87 1968 Dewey Class. No.: 591