共 22 条
[2]
[Anonymous], 1988, MMWR, V36, P817
[3]
BENATAR SR, 1982, S AFR MED J, V62, P359
[4]
BOTHA JL, 1985, S AFR MED J, V67, P977
[5]
BOTHA JL, 1986, S AFR MED J, V70, P766
[6]
FLEISS JL, 1982, STATISTICAL METHODS
[7]
GILPIN TP, 1987, S AFR MED J, V72, P260
[8]
MAUSNER JS, 1986, EPIDEMIOLOGY INTRO T, P338
[9]
METS JT, 1984, CURATIONIS, V3, P19
[10]
MYERS J, 1986, S AFR MED J, V70, P251