00621naa#a2200169#i#450# EN\URAL'SKIY GOSUDARSTVENNYY AGRARNYY UNIVERSITET\bibl\42599 20240509041433.4 1997-4868 20210313b2021####ek#y0engy0150####ca RU Milk productivity and reproductive performance of black and white cows, depending on the technology of milk production Journal article Ekaterinburg Ural State Agrarian University 2021 8 с. Journal article local Nazarova Kristina Polikarpovna Berezkina G. Yu. usau.editorum.ru