McEwen, Robert Stanley, 1888- Vertebrate embryology / Robert S. McEwen. - 4th ed. - New Delhi : Oxford & IBH, c1957-1969 [Reprinted 1978]. - 701 p. : ill. ; 22 cm. Includes bibliographies and index. Subjects--Topical Terms: Vertebrates--Embryology. Dewey Class. No.: 571.86 / MCV 1978