共 20 条
[11]
HEYMANN DL, 1983, LANCET, V2, P1470
[12]
HULL HF, 1983, LANCET, V1, P972
[13]
LOENING WEK, 1983, LANCET, V2, P324
[14]
MITCHELL CD, 1985, PROG MED VIROL, V31, P1
[16]
SNEDECOR GW, 1980, STATISTICAL METHODS, P206
[17]
WHITTLE HC, 1984, LANCET, V2, P834
[18]
1986, WKLY EPIDEMIOL REC, V25, P191
[19]
1979, WKLY EPIDEMIOL REC, V54, P337
[20]
1978, PERSPECTIVES DEMOGRA