Moore, Keith L. Before we are born : basic embryology and birth defects / Keith L. Moore. - 3rd ed. - Philadelphia : Saunders, 1989. - x, 306 p. : ill. (some col.) ; 26 cm. Includes index. Bibliography: p. 291-294. ISBN: 0721622070 (pbk.) Subjects--Topical Terms: Embryology, Human.Fetus--Abnormalities.