共 15 条
[2]
COULAM CB, 1979, OBSTET GYNECOL, V53, P44
[3]
DEWHURST CJ, 1971, J OBSTET GYN BR COMM, V78, P1077
[4]
GANS SL, 1962, AM J DIS CHILD, V104, P114
[7]
JAGIELLO G, 1962, LANCET, V1, P329
[10]
MORRIS JM, 1963, AM J OBSTET GYNECOL, V87, P731