By Oettling G.   Franz H.B.G.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|77|2|211-216

Elsevier‎(1998)‎

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By Hirnle P .   Franz H. B. G.   Sulkarnejewa E.   Pfeiffer K. H.   Kiesel L.   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|20|4|392-395

Informa Healthcare‎(2000)‎

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