共 26 条
[1]
[Anonymous], J EPIDEMIOL COMMUNIT
[2]
[Anonymous], 1976, JAMA, V236, P1471
[3]
BROCK DJH, 1979, LANCET, V1, P1281
[4]
BULMER MG, 1970, BIOL TWINNING MAN, P68
[5]
CAMPBELL S, 1971, J OBSTET GYN BR COMM, V78, P513
[6]
CHUNG CS, 1975, FACTORS AFFECTING RI, V2, P29
[7]
CRANDALL BF, 1983, CLIN CHEM, V29, P531
[9]
ELWOOD JM, 1980, EPIDEMIOLOGY ANENCEP, P225
[10]
THE PREVALENCE OF NEURAL-TUBE DEFECTS AMONG ETHNIC-GROUPS IN BROOKLYN, NEW-YORK
[J].
JOURNAL OF CHRONIC DISEASES,
1982, 35 (01)
:53-60