00550naa#a2200181#i#450# EN\INFRA-M\bibl\39199 20241021115942.1 2500-0497 20200825b2020####ek#y0engy0150####ca RU Excursion business in Moscow and Moscow region in the 1920s Journal article Moscow INFRA-M Academic Publishing LLC. 2020 3 с. Journal article local Всеобщая история. 94 Ogorodnikova O. A. Firsova O. G. zh-szf.ru