共 7 条
[3]
PETTIT PD, 1988, OBSTET GYNECOL, V71, P580
[4]
Price F V, 1990, Obstet Gynecol Surv, V45, P151, DOI 10.1097/00006254-199003000-00001
[5]
SHEMWELL RE, 1970, OBSTET GYNECOL, V36, P299
[6]
STEEGE JF, 1987, OBSTET GYNECOL, V70, P64
[7]
SYMMONDS RE, 1979, OBSTET GYNECOL, V54, P174