Media type: E-Article Title: Natürliche Familienplanung Contributor: Freundl, G.; Frank-Herrmann, P.; Raith-Paula, E. Published: Springer Science and Business Media LLC, 1998 Published in: Der Gynäkologe, 31 (1998) 5, Seite 398 Language: Not determined DOI: 10.1007/s001290050280 ISSN: 0017-5994 Keywords: Obstetrics and Gynecology Origination: Footnote: