The effect of two mineral–vitamin premixes on the blood biochemical parameters, milk yield and composition of Holstein–Friesian cows in Kazakhstan
Gulzhan Mussayeva, Gulshat I. Shaykamal, I. Aitzhanova, Aigerim Kazhiyakbarova, J. Miciński, Alicja Sobczak, Nurgul A. Meldebekova, Gulnaz Ilgekbayeva, N. Rametov
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