共 8 条
[5]
NEURAL-TUBE DEFECTS AND VITAMINS - THE NEED FOR A RANDOMIZED CLINICAL-TRIAL
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1984, 91 (06)
:516-523
[7]
YATES JRW, 1987, CLIN GENET, V31, P279
[8]
1987, LANCET, V2, P376