共 27 条
[3]
BLOCK AH, 1981, N01HD02838 NAT I CHI
[4]
Committee to Study the Prevention of Low Birthweight
[5]
Division of Health Promotion and Disease Prevention
[6]
Institute of Medicine, 1985, PREV LOW BIRTHW
[10]
INFLUENCE OF PREGNANCY SPACING ON OUTCOME OF PREGNANCY
[J].
BMJ-BRITISH MEDICAL JOURNAL,
1973, 4 (5895)
:753-756