By Khunda A   Calvert SM   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|25|4|413-413

Informa Healthcare‎(2005)‎

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By Calvert S.M.   Tuffnell D.J.   Haley J.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|64|2|179-184

Elsevier‎(1996)‎

Access to resources Favorite 2.2080212