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- [26] CALF BIRTH WEIGHTS IN BEEF BREEDING HERDS AND RELATIONSHIPS BETWEEN BIRTH-WEIGHT AND CALF MORTALITY AND CALVING DIFFICULTIES [J]. ANIMAL PRODUCTION, 1976, 22 (FEB): : 159 - 160
- [28] REPRODUCTIVE EFFICIENCY AND CALF SURVIVAL IN ONTARIO BEEF COW-CALF HERDS - A CROSS-SECTIONAL MAIL SURVEY [J]. CANADIAN JOURNAL OF COMPARATIVE MEDICINE-REVUE CANADIENNE DE MEDECINE COMPAREE, 1985, 49 (01): : 27 - 33