共 7 条
[2]
BUTLER NR, 1963, PERINATAL MORTALITY, P126
[3]
PARIKH MN, 1961, J OBSTET GYN BR COMM, V68, P818
[4]
SCHAFFNER F, 1966, OBSTET GYNECOL, V27, P130
[5]
THIERY M, 1972, P INT S TREATMENT FO, P21
[6]
WESSELIU.A, 1971, BMJ-BRIT MED J, V3, P144