共 7 条
- [3] MICHAJOLOV N. N., 1950, J AM VET MED ASSOC, V117, P337
- [4] PATERSON DD, 1939, STATISTICAL TECHNIQU, P19
- [5] PHILLIPS PAUL H., 1940, JOUR DAIRY SCI, V23, P399, DOI 10.3168/jds.S0022-0302(40)95541-2
- [6] THACKER DL, 1951, J ANIM SCI, V10, P1082
- [7] UNDERBJERG GRAVERS K. L., 1942, JOUR ANIMAL SCI, V1, P149