共 50 条
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- [48] SURVIVAL RATE OF DAIRY-COWS AS INFLUENCED BY HERD PRODUCTION LEVEL, AGE AT 1ST CALVING, AND SIRE ACTA AGRICULTURAE SCANDINAVICA, 1979, 29 (01): : 42 - 44
- [50] PREDICTION OF PRODUCTION TRAITS FROM BIRTH-WEIGHT AND AGE AT 1ST CALVING IN RED SINDHI COWS INDIAN VETERINARY JOURNAL, 1992, 69 (04): : 375 - 376