共 8 条
[1]
CAMPBELL S, 1971, J OBSTET GYN BR COMM, V78, P513
[2]
CAMPBELL S, 1970, Journal of Obstetrics and Gynaecology of the British Commonwealth, V77, P1057
[3]
CAMPBELL S, 1968, Journal of Obstetrics and Gynaecology of the British Commonwealth, V75, P568
[6]
LUNT RM, 1974, J OBSTET GYN BR COMM, V81, P682
[7]
VARMA TR, 1973, J OBSTET GYN BR COMM, V80, P316
[8]
Willocks J, 1967, J Obstet Gynaecol Br Commonw, V74, P639