General zoology Claude A. Villee, Warren F. Walker, Jr. [and] Frederick E. Smith. Villee, Claude Alvin, 1917- Walker, Warren F. (Warren Franklin), joint author. Smith, Frederick E., 1920- joint author. Zoology. QL47 .V5 1968 591 VIG Includes bibliographies. Philadelphia : Saunders, 1968. 1968. 1968 Text xxi, 844 p. : eng