共 14 条
[1]
EDWARDS S, 1990, DEUT TIERARZTL WOCH, V97, P79
[3]
JENSEN MH, 1981, ACTA VET SCAND, V22, P85
[4]
LEFORBAN Y, 1988, RECL MED VET, V164, P385
[5]
Liess B, 1990, Rev Sci Tech, V9, P151
[9]
ROEHE PM, 1991, THESIS U SURREY GUIL