Salnikova ИН. Salnikova I.N. A postcard as an attribute of the service of needs in the identification of historical processes and socio-cultural phenomena: DOI:10.22394/2225-8272-2022-11-4-75-83 EDN: IFXPUW. Вестник ГМУ [Internet]. 2022 Dec. 26 [cited 2026 Sep. 22];11(4):75-83. Available from: https://www.journalgmu.ru/index.php/journalgmu/article/view/193