共 11 条
[1]
Beard R W, 1967, J Obstet Gynaecol Br Commonw, V74, P812
[8]
POLISHUK WZ, 1975, HAREFUAH, V89, P395
[9]
ROUX JR, 1980, MANAGEMENT HIGH RISK
[10]
Saling E, 1967, J Obstet Gynaecol Br Commonw, V74, P799