TY JOUR TI BIOTECHNOLOGICAL TECHNIQUES FOR IMPROVING THE QUALITY OF BRREEDING REPLACEMENT YOUNG ANIMALS OF THE CATTLE KW calves KW blood KW assessment KW viability KW calving JO Bulletin Samara State Agricultural Academy AU Uskova, I.V. AU Baymishev, K.B. PY 2021 IS 6 PB Samara State Agrarian University