00598naa#a2200169#i#450# EN\URAL'SKIY GOSUDARSTVENNYY AGRARNYY UNIVERSITET\bibl\85178 20240716074440.2 1997-4868 20240706b2024####ek#y0engy0150####ca RU Cluster analysis in assessing the efficiency of grain production in the Tyumen region Journal article Ekaterinburg Ural State Agrarian University 2024 13 с. Journal article local Agapitova Lyudmila Georgievna Butorina Galina Yur'evna usau.editorum.ru