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Influence of certain factors on the yield and composition of milk of Black-and-White Lowland cows in the Olsztyn province during five consecutive lactations. I. Effect of the age at first calving



Influence of certain factors on the yield and composition of milk of Black-and-White Lowland cows in the Olsztyn province during five consecutive lactations. I. Effect of the age at first calving



Roczniki Nauk Rolniczych 5(1): 9-22




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Influence of certain factors on the yield and composition of milk of Black-and-White Lowland cows in the Olsztyn province during five consecutive lactations. III. Effect of calving and gestation interval and dry period on yield and composition of milk. Roczniki Nauk Rolniczych 5(1): 37-53, 1973

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