共 18 条
[1]
BRADLEY S, 1980, LANCET, V1, P1195
[2]
BROMHAM DR, 1980, LANCET, V2, P485
[3]
CASE BD, 1971, J OBSTET GYN BR COMM, V78, P203
[4]
CRAGIN EB, 1904, NY MED J, V104, P1
[5]
DEWHURST CJ, 1957, J OBSTET GYNAECOL, V64, P113
[6]
EVRARD JR, 1977, OBSTET GYNECOL, V50, P594
[7]
GEIRSSON RT, 1981, J OBSTET GYNAECOL, V2, P76
[8]
LAWSON J B, 1968, Journal of Obstetrics and Gynaecology of the British Commonwealth, V75, P1296