Williams, J. Whitridge Williams Obstetrics / Jack A. Pritchard, Paul C. MacDonald. - 15th ed. - New York : Appleton-Century-Crofts, c1976. - xiv, 1003 p., 4 leaves of plates : ISBN: 0838597300 Subjects--Topical Terms: Obstetrics. Dewey Class. No.: 618.2 / Ob,15