共 5 条
- [1] ALEXANDER G. I., 1954, Australian Veterinary Journal, V30, P68, DOI 10.1111/j.1751-0813.1954.tb05407.x
- [2] HOYER N., 1954, QUEENSLAND AGRIC JOUR, V79, P46
- [3] OLMSTEAD RH, 1951, 146 PA AGR EXT SERV
- [4] SNEDECOR GW, 1946, STATISTICAL METHODS
- [5] WISE G. H., 1942, JOUR DAIRY SCI, V25, P529, DOI 10.3168/jds.S0022-0302(42)95321-9