共 18 条
[11]
2-M
[12]
KISTNER RW, 1967, ADV OBSTET GYNECOL, V1, P391
[13]
MEEMA HE, 1965, OBSTET GYNECOL, V26, P333
[15]
PARRISH HM, 1967, AM J OBSTET GYNECOL, V99, P155
[16]
SMITH OW, 1970, LANCET, V1, P1152
[18]
1970, LANCET, V1, P72