共 16 条
[6]
CORKE BC, 1985, OBSTET GYNECOL, V65, P837
[7]
FULLER WA, 1976, INTRO STATISTICAL TI, P52
[9]
LEDERMAN RP, 1977, AM J OBSTET GYNECOL, V129, P5, DOI 10.1016/0002-9378(77)90809-2