共 33 条
[11]
Huck R. A., 1964, Veterinary Record, V76, P1151
[12]
JOHNSON KP, 1974, LAB INVEST, V30, P608
[14]
Liess B, 1975, Berl Munch Tierarztl Wochenschr, V88, P397
[15]
Liess B, 1975, Berl Munch Tierarztl Wochenschr, V88, P405
[16]
Liess B, 1976, Berl Munch Tierarztl Wochenschr, V89, P176
[17]
LIESS B, 1976, PUBL EUR, V5451, P333
[18]
MENGELING WL, 1968, P 72 ANN M US AN HLT, P283
[19]
MEYER H, 1981, ZBL VET MED B, V28, P659
[20]
MEYER H, 1978, THESIS HANNOVER VET