共 8 条
[2]
FLIEGNER JR, 1972, J OBSTET GYN BR COMM, V79, P810
[5]
Mackay E V, 1967, Aust N Z J Obstet Gynaecol, V7, P94, DOI 10.1111/j.1479-828X.1967.tb02495.x
[8]
WRAY PM, 1964, J OBSTET GYN BR COMM, V71, P97