共 25 条
[1]
Allcroft R., 1963, Veterinary Record, P487
[2]
ALLCROFT R., 1963, Veterinary Record, V75, P259
[3]
ALLCROFT R., 1962, Veterinary Record, V74, P863
[6]
ASHLEY LM, 1964, FED PROC, V23, P105
[7]
ASHLEY LM, 1965, FED PROC, V24, P627
[9]
CHANG SB, 1963, SCIENCE, V142, P1191, DOI 10.1126/science.142.3596.1191
[10]
CRAWFORD M., 1962, Veterinary Bulletin, Weybridge, V32, P415