共 20 条
[1]
Beal S, 1967, Med J Aust, V2, P597
[2]
BETHERAS FR, 1962, AUST NZJ OBSTET GYNA, V2, P31
[3]
COLLMANN RD, 1968, MENTAL DEFICIENCY RE, V12, P22
[4]
DANKS DM, 1983, LANCET, V1, P65
[6]
Elwood JM, 1980, EPIDEMIOLOGY ANENCEP
[8]
Hobbs M S, 1974, Br J Prev Soc Med, V28, P66
[9]
Jones W R, 1967, Med J Aust, V1, P104
[10]
MATHERS CD, 1983, COMMUNITY HEALTH ST, V7, P60

