TY JOUR TI QUALITY OF MILK MONITORING DURING CONTROL COWS MILKING IN THE TYUMEN REGION BREEDING FARMS KW milk KW milk fat KW milk protein KW urea KW ketone bodies KW Holstein breed KW Black-and-white breed. JO Bulletin of KSAU AU Chasovschikova, M.A. AU Gubanov, M.V. PY 2021 IS 0 PB Krasnoyarsk State Agrarian University