共 17 条
[1]
BUTMAN M, 1983, PRENATAL NUTRITION C, P26
[3]
FIELD CS, 1983, PRIMARY CARE, V10, P295
[6]
HALL MH, 1980, LANCET, V2, P78
[7]
Harris JE., 1982, EC ASPECTS HLTH, P15
[9]
KESSNER DM, 1973, INFANT DEATH ANAL MA, P59
[10]
KLEINBAUM DG, 1978, APPLIED REGRESSION A, P188