共 11 条
[4]
KREBS HB, 1986, OBSTET GYNECOL, V67, P473
[5]
LAVIN PT, 1987, OBSTET GYNECOL, V69, P223
[6]
LUESLEY D, 1988, LANCET, V2, P599
[8]
SEROV SF, 1973, INT CLASSIFICATION T, V9
[9]
SWENERTON KD, 1985, OBSTET GYNECOL, V65, P264