Williams, J. Whitridge 1866-1931. Williams obstetrics / J. Whitridge Williams, Louis M. Hellman, Jack A. Pritchard, - 14th ed. - New York : Appleton-Century-Crofts, 1971. - x, 1242 p. illus. (part col.) 26 cm. Includes bibliographies. Subjects--Topical Terms: Obstetrics. LC Class. No.: RG524 / .W7 1971 Dewey Class. No.: 618.2 / WIL 1971