共 77 条
[2]
Armstrong D. G., 1966, Journal. University of Newcastle upon Tyne Agricultural Society, V20, P21
[3]
BRIGGS MT, 1967, UREA PROTEIN SUPP ED, P391
[5]
BROWN LD, 1965, J DAIRY SCI, V48, P816
[6]
BURROUGHS, 1951, J ANIM SCI, V10, P693
[7]
CANNON CY, 1933, 28 ANN M ADSA, P65
[10]
CONRAD HR, 1961, OHIO FARM HOME RES, V46, P13