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- [43] THE INFLUENCE OF THE COPPER STATUS ON THE REPRODUCTION PERFORMANCE AND THE MILK-YIELD OF FEMALE CATTLE IN 2 COPPER DEFICIENCY .2. THE INFLUENCE OF COPPER DEFICIENCY ON THE REPRODUCTION PERFORMANCE AND THE MILK-YIELD OF THE COWS ARCHIV FUR TIERERNAHRUNG-ARCHIVES OF ANIMAL NUTRITION, 1981, 31 (10): : 697 - 704