共 22 条
- [1] BRIGGS RA, 1957, MINNESOTA FARM HOME, V14, P16
- [2] CAMBURN OM, 1942, VAESB 494
- [3] CONRAD HR, 1958, J ANIM SCI, V17, P1197
- [4] DIJKSTRA ND, 1958, VERSLAG LANDBOUWK ON
- [6] GORDON CH, 1960, J DAIRY SCI, V43, P866
- [7] GRAVES RR, 1938, USDA TB 649
- [8] HILLMAN D, 1958, J DAIRY SCI, V41, P720
- [10] KANE EA, 1953, J DAIRY SCI, V36, P637, DOI 10.3168/jds.S0022-0302(53)91540-9