Petrova М.А. 2025. MISSION OF THE FIRST RUSSIAN RESIDENT TO THE IMPERIAL DIET GEORG HEINRICH BÜTTNER IN 1757–1758. PERM UNIVERSITY HERALD. History. 2 (69) (Jun. 2025), 46–57. DOI:https://doi.org/10.17072/2219-3111-2025-2-46-57.