共 14 条
[2]
CARR DH, 1965, OBSTET GYNECOL, V26, P308
[3]
ERHARDT CL, 1963, AM J PUB HEALTH, V53, P9
[6]
MCDONALD AD, 1961, BRIT J PREV SOC MED, V15, P4
[7]
POTTER E, 1963, BIRTH DEFECTS
[8]
SHAPIRO S, 1965, AM J PUB HEALTH, V55, P2
[9]
SHAPIRO S, 1962, FUND QUART, V40, P7
[10]
TATUM EL, 1966, MAY REFL RES FUT MED