International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 1998 > 63 > Supplement 1 > S147-S150
International Journal of Gynecology and Obstetrics > 1998 > 63 > Supplement 1 > S167-S173
International Journal of Gynecology and Obstetrics > 1998 > 63 > Supplement 1 > S85-S90