共 13 条
- [2] EARLE IMOGENE P., 1935, JOUR AGRIC RES, V51, P479
- [3] GORDON W. A. M., 1958, Veterinary Record, V70, P542
- [4] GREGORY DW, 1955, VET MED, V50, P609
- [5] LEMCKE RM, 1957, VET REC, V69, P335
- [6] Lloyd M.K., 1957, VET REC, V69, P1172
- [7] McGIRR J L, 1947, Br Vet J, V103, P345
- [8] SCHOFIELD F. W., 1955, CANADIAN JOUR COMP MED AND VET SCI, V19, P245
- [9] SCHOFIELD F. W., 1955, CANADIAN JOUR COMP MED AND VET SCI, V19, P242
- [10] SOJKA W. J., 1957, Veterinary Record, V69, P293