共 13 条
- [1] ASCHAFFENBURG R., 1959, Int. Dairy Congr., V5, P1631
- [2] BLACKBURN P. S., 1959, BRIT VET JOUR, V115, P311
- [5] BLACKBURN PS, 1952, THESIS U GLASGOW
- [7] DAVIDSON I, 1961, Vet Rec, V73, P1015
- [9] MCFARLANE D., 1949, Veterinary Record, V61, P807
- [10] van RENSBURG S. W. J., 1947, ONDERSTEPOORT JOUR VET SCI AND ANIMAL INDUST, V22, P91