00688naa#a2200193#i#450# EN\INFRA-M\bibl\41088 /en/manage/index 20241214082557.6 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. test.editorum.ru /en/manage/index