共 12 条
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- [3] MOTION JH, 1933, NZ DAIRY EXPT, V8, P3
- [4] MUNCHPETERSEN E, 1940, B COUN SCI IND RES A, V134, P22
- [6] NEAVE FK, 1951, ANN REP NAT I DAIRY, P23
- [9] ROSE VT, 1943, VET MED, V38, P14
- [10] STEYN H. P, 1940, JOUR S AFRICAN VET MED ASSOC, V11, P123