共 15 条
[2]
BEVIS DCA, 1956, J OBSTET GYNAECOL, V63, P68
[3]
BEVIS DCA, 1950, LANCET, V2, P443
[4]
CHARLES AG, 1966, OBSTET GYNECOL, V28, P182
[5]
CHERRY SH, 1965, OBSTET GYNECOL, V26, P826
[6]
DAY R, 1954, PEDIATRICS, V13, P333
[9]
JOHNSTON WH, 1967, PEDIATRICS, V39, P88