Tietze, Christopher Abortion in the seventies / Christopher Tietze & Sarah Lewit - New York : Population Council (PC) , 1981 - 16p. : ill. ; 22 cm. - Working papers (Population Council. Center for Policy Studies) No. 68 . Includes bibliographical references. Subjects--Topical Terms: Abortion Gov. Doc. Class. No.: US PC CPS WP-68