共 24 条
[3]
BRUM EW, 1963, J DAIRY SCI, V46, P619
[4]
CASTLE WE, 1919, NATL ACAD SCI P, V5, P428
[5]
DAVIS HP, 1953, 2 NEBR AGR EXP STA M
[6]
DAYTON AD, 1967, THESIS MICHIGAN STAT
[7]
FOHRMAN MH, 1954, USDA1074 TECH B
[8]
GAALAAS RF, 1962, J DAIRY SCI, V45, P671
[10]
HANSSON A., 1961, Kungliga Lantbrukshogskolans Annaler, V27, P287