International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 1998 > 63 > Supplement 1 > S151-S156
International Journal of Gynecology and Obstetrics > 1998 > 63 > Supplement 1 > S157-S160
International Journal of Gynecology and Obstetrics > 1998 > 63 > Supplement 1 > S33-S42