共 8 条
[1]
BRADLEY DW, 1975, J INFECT DIS, V131, P303
[5]
FLEHMIG B, 1978, BUNDESGESUNDHEITSBLA, V17, P277
[7]
PROVOST PJ, 1979, P SOC EXP BIOL MED, V160, P213, DOI 10.3181/00379727-160-40422