共 7 条
[1]
BICHARD M, 1972, PIG PRODUCTION
[4]
HARVEY WR, 1960, ARS208 US DEP AGR
[5]
HOLTMANN WB, 1971, CAN J ANIM SCI, V51, P823
[7]
OMTVEDT IT, 1967, MP79 OKL AGR EXP STA, P26