共 15 条
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- [2] CAMBURN OM, 1944, VT AGR EXP STAT B, V509
- [3] DAWSON JR, 1940, USDA TECH B, V739
- [6] HEITMAN, 1959, J ANIMAL SCI, V18, P796
- [9] POPE AL, 1957, NAT RES COUNCIL PUBL, V504
- [10] SALMON SC, 1925, KAN AGR EXP STAT TEC, V15