Author:
Sivin Irving,Sanchez Francisco Alvarez,Diaz Soledad,Holma Pentti,Coutinho Elsimar,McDonald Olivia,Robertson Dale N.,Stern Janet
Subject
Obstetrics and Gynaecology,Reproductive Medicine
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5. Contraceptive efficacy among married women 15-44 years of age in the United States, 1970-1973;Ford;Vital and Health Statistics of the National Center for Health Statistics,1978
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