Prevention of pregnancy by the Graefenberg ring method; a re-evaluation after 28 years' experience

Oppenheimer, W.

American Journal of Obstetrics and Gynecology 78(2): 446-454

1959


ISSN/ISBN: 0002-9378
PMID: 13670226
DOI: 10.1016/0002-9378(59)90203-0
Document Number: 477111

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