共 15 条
[1]
BEJAR R, 1981, OBSTET GYNECOL, V57, P479
[3]
CHRISTENSEN KK, 1980, OBSTET GYNECOL, V55, P187
[7]
GONIK B, 1985, OBSTET GYNECOL, V65, P456
[8]
GORDON M, 1974, CONTROVERY OBSTETRIC, V2, P39
[9]
KITZMILLER JL, 1984, PRETERM BIRTH CAUSES, P298
[10]
LEBHERZ TB, 1963, AM J OBSTET GYNECOL, V87, P218