A randomized prospective study of the use-effectiveness of two methods of natural family planning: An interim report
- 1 July 1979
- journal article
- clinical trial
- Published by Elsevier in American Journal of Obstetrics and Gynecology
- Vol. 134 (6) , 628-631
- https://doi.org/10.1016/0002-9378(79)90642-2
Abstract
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