共 20 条
[1]
[Anonymous], 1981, Statistical Tables
[3]
ERSKINE RJ, 1987, J AM VET MED ASSOC, V190, P1411
[4]
ERSKINE RJ, 1988, J AM VET MED ASSOC, V192, P761
[8]
GROMMERS FJ, 1988, NETH MILK DAIRY J, V42, P43
[9]
Harmon R., 1990, Microbiological Procedures for the Diagnosis of Bovine Udder Infection, 3rd Edn
[10]
HOBLET KH, 1988, J AM VET MED ASSOC, V192, P777