Walter, Herbert Eugene, 1867-1945. Biology of the vertebrates : a comparative study of man and his animal allies / Herbert E. Walter and Leonard P. Sayles. - 3d ed. - New York : The Macmillan Company, 1949 [printing 1956]. - xix, 875 p. : ill.; 25 cm. Includes index and Bibliography Subjects--Topical Terms: Vertebrates.Vertebrates--Anatomy.Anatomy, Comparative. Dewey Class. No.: 596 / WAB 1956