00635naa#a2200181#i#450# EN\INFRA-M\bibl\41088 20240521173924.2 2587-9111 20201228b2020####ek#y0engy0150####ca RU Determining the Size of the Middle Class in Russia Based on a Set of Criteria "Level of Education – Professional Status» Journal article Moscow INFRA-M Academic Publishing LLC. 2020 6 с. Journal article local Экономика. Экономические науки. 33 Guzakova O. L. Tulina T. M. naukaru.ru