共 53 条
[1]
AFIFI YA, 1968, NETH MILK DAIRY J-NE, V22, P83
[3]
INDIRECT SELECTION OF BULLS FOR IMPROVED RESISTANCE TO DISEASES IN DAIRY-CATTLE
[J].
LIVESTOCK PRODUCTION SCIENCE,
1981, 8 (04)
:321-330
[4]
SELECTION OF DAIRY-CATTLE FOR OVERALL EXCELLENCE
[J].
JOURNAL OF DAIRY SCIENCE,
1975, 58 (12)
:1876-1879
[7]
CRANDALL B, 1982, COST BENEFITS FOOD A, P27
[8]
DUKAS P, 1988, DHIA DRPC ACTIVITY S
[10]
ERB HN, 1978, CAN J COMP MED, V42, P1