TY JOUR TI QUALITY OF COW COLUSTRUM OF DIFFERENT HOLSTEIN BREED GENEALOGICAL LINES KW breed KW cow KW line KW colostrum KW composition KW immunoglobulins JO Bulletin Samara State Agricultural Academy AU Karamayeva, A.S. AU Bakayeva, L.N. AU Karamayev, S.V. AU Lapin, G.V. PY 2021 IS 6 PB Samara State Agrarian University