Villee, Claude Alvin. Introduction to animal biology / Claude A. Villee, Warren F. Walker, Jr., Robert D. Barnes. - Philadelphia : Saunders Company, c1979. - xvi, 616 pages : Illustrations ; 28 cm. Glossary-GI-G32. Includes bibliographies and index. Subjects--Topical Terms: Zoology. LC Class. No.: QL45.2 / .V54 Dewey Class. No.: 591