共 4 条
[1]
Golan A, 1989, Obstet Gynecol Surv, V44, P96, DOI 10.1097/00006254-198902000-00004
[3]
MCDONALD IA, 1957, J OBSTET GYNAECOL, V64, P346
[4]
Shirodkar VN, 1955, ANTISEPTIC, V52, P299