TY JOUR TI CONTENT OF IMMUNOGLOBULINS IN COLOSTRUM OF COWS OF DIFFERENT BREEDS DEPENDING ON TIME AFTER CALVING KW breed KW cow KW time KW calving KW colostrum KW immunoglobulins KW classes JO Bulletin Samara State Agricultural Academy AU Bakayeva, L.N. AU Karamaev, S.V. AU Karamayeva, A.S. PY 2019 IS 4 PB Samara State Agrarian University