共 8 条
[2]
DYSON R, 1966, J DAIRY SCI, V49, P1091
[3]
HOSTETTLER H, 1952, LANDW JB SCHWEIZ, V1, P307
[5]
PETERS II, 1954, TEX J SCI, V6, P442
[7]
SHIMMIN P. D., 1965, AUSTRALIAN J DAIRY TECHNOL, V20, P119
[8]
STEPHENS R, 1967, 25 P ANN M EL MICR S