1. Abortion surveillance-United States, 1996;Koonin;MMWR Morb Mortal Wkly Rep,1999
2. Manual vacuum aspiration for first-trimester abortion;Westfall;Arch Fam Med,1998
3. Surgical abortion for gestations of less than 6 weeks;Edwards;Curr Probl Obstet Gynecol Fertil,1997
4. Abortion incidence and services in the United States, 1995-1996;Henshaw;Fam Plann Perspect,1998
5. Abortion mortality, United States, 1972 through 1987;Lawson;Am J Obstet Gynecol,1994