About the Tunguska harp from the materials of M.N. Zhirkov based on archival data and drawings by P.V. Sleptsov, E.M. Shaposhnikov, E.P. Shestakov - Pavlova-Borisova, Tat'yana Vladimirovna; Borisova, Aitalina Andrianovna (Философия и культура, 2025)