共 11 条
[1]
DEMUYLDER X, 1982, ACTA GENET MED GEMEL
[2]
FABIA J, 1979, VIE MED CAN FR, V8, P28
[3]
LIGGINS GC, 1972, PEDIATRICS, V50, P515
[4]
McKeown T, 1960, CIBA F S CONGENITAL, P2
[6]
DOUBLE-BLIND TRIAL OF RITODRINE AND PLACEBO IN TWIN PREGNANCY
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1979, 86 (09)
:706-709
[7]
PERSSON PH, 1979, ACTA OBSTET GYN SCAN, V58, P3
[9]
SWINSCOW TDV, 1980, STATISTICS SQUARE ON
[10]
USHER R, 1977, SEMIN PERINATOL, V1, P309