TY JOUR TI AMINO ACID COMPOSITION OF FIRST-CALF COWS’ MILK PROTEIN KW first-calf heifers KW Dutch and German Holsteins KW amino acid composition KW milk JO Bulletin of KSAU AU Kosilov, V.I. AU Yuldashbayev, Y.A. AU Kadralieva, B.T. PY 2022 IS 0 PB Krasnoyarsk State Agrarian University