TY JOUR TI THE TENSION OF COLOSTRAL IMMUNITY OF CALVES TO RESPIRATORY VIRUS KW calves KW colostral antibodies KW viruses KW respiratory diseases KW cows KW specific prevention KW immuni-ty JO Bulletin of KSAU AU Schislenko, S.A. AU Shcherbak, O.I. AU Moroz, A.A. AU Sivkov, I.O. AU Sushkova, M.A. AU Shcherbak, Y.I. PY 2018 IS PB Krasnoyarsk State Agrarian University