共 18 条
- [1] BAUMGARDT BR, 1964, 1 U WISC DEP DAIR SC
- [2] BUSH LF, 1955, J ANIM SCI, V14, P465
- [4] CONRAD HR, 1966, OHIO AGR RES DEV CTR, V51, P51
- [5] COULOMBE JJ, 1963, CLIN CHEM, V9, P102
- [9] LOOSLI JK, 1966, 1349 NAT AC SCI NAT
- [10] MURDOCH J. C., 1962, JOUR BRIT GRASSLAND SOC, V17, P268