Ectopic Pregnancy and Prior Induced Abortion.Published in:American Journal of Public Health, 1982, v. 72, n. 3, p. 253, doi. 10.2105/AJPH.72.3.253By:Levin, Ann Aschengrau;Schoenbaum, Stephen C.;Stubblefield, Phillip G.;Zimicki, Susan;Monson, Richard R.;Ryan, Kenneth J.Publication type:Article