共 4 条
[1]
HOWE C, 1971, J INFECT DIS, V58, P753
[2]
LAWS L., 1964, AUSTRALIAN VETERINARY J, V40, P309, DOI 10.1111/j.1751-0813.1964.tb04524.x
[4]
THOMAS AD, 1979, AM J EPIDEMIOL, V100, P515