共 4 条
[1]
CUNNINGHAM FG, 1982, CURRENT OBSTET GYNAE, P337
[2]
KEITH LG, 1984, AM J OBSTET GYNECOL, V149, P215, DOI 10.1016/0002-9378(84)90201-1
[4]
WOLNERHANSSEN P, 1984, FERTIL STERIL, V42, P102