共 12 条
[7]
GOERING HK, 1970, AGR HDB ARS USDA, V379
[8]
HILLMAN D, 1978, EXT B MICH STAT U E, V1263
[9]
MCCULLOUGH ME, 1966, J DAIRY SCI, V50, P705
[10]
MILLER CN, 1967, J DAIRY SCI, V50, P616