共 12 条
[2]
BAYLEY ND, 1961, 1240 US DEP AGR TECH
[3]
DICKERSON GE, 1969, J DAIRY SCI, V52, P946
[4]
DICKERSON GE, 1954, 551 MISS AGR EXP STA
[5]
FREEMAN MG, 1970, JUN AM DAIR SCI ASS
[8]
SKJERVOLD H, 1967, WISS Z HUMBOLDT U BE, V16, P547
[10]
WALTON RE, 1970, JUN AM DAIR SCI ASS