共 36 条
[1]
ALVAREZ RRD, 1962, AM J OBSTET GYNECOL, V83, P1476
[2]
REDUCTION OF INCIDENCE OF PREMATURITY BY FOLIC ACID SUPPLEMENTATION IN PREGNANCY
[J].
BMJ-BRITISH MEDICAL JOURNAL,
1970, 1 (5687)
:16-+
[4]
Butler NR, 1963, PERINATAL MORTALITY
[6]
CHANARIN I, 1959, LANCET, V2, P634
[7]
DAVIDSON S, 1969, HUMAN NUTRITION DIET, P460
[10]
GILES C, 1960, BRIT MED J, V27, P636