TY JOUR TI THE EFFECT OF BISOLBI ON BIOCHEMICAL AND PRODUCTIVE PROCESSES OF THE HOLSTEIN-FRIESIAN CALVES KW calves KW additive KW Bacillus subtilis KW Bisolbi KW indicator KW biochemical KW productive JO Bulletin Samara State Agricultural Academy AU Molyanova, G.V. AU Nogotkov, M.P. PY 2021 IS 6 PB Samara State Agrarian University