00540naa#a2200169#i#450# EN\URAL'SKIY GOSUDARSTVENNYY AGRARNYY UNIVERSITET\bibl\47379 20240515114151.3 1997-4868 20211126b2021####ek#y0engy0150####ca RU Length of productive life the cows of Simmental breed Journal article Ekaterinburg Ural State Agrarian University 2021 8 с. Journal article local Ignat'eva L. P. Sermyagin A. A. usau.editorum.ru