Saunders, John Warren, 1919- Patterns and principles of animal development / by John W. Saunde rs, Jr. - New York : Macmillan , 1970 - xiii, 282 p. : ill. ; 26 cm. - The Macmillan biology series . Includes bibliographies. Subjects--Topical Terms: Embryology.Developmental genetics. Dewey Class. No.: Q636.08926 SAU