International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 1997 > 58 > 1 > 167-176
International Journal of Gynecology and Obstetrics > 1997 > 58 > 1 > 5-11
International Journal of Gynecology and Obstetrics > 1997 > 58 > 1 > 159-165