Round table Problems in Biographies of Russian Immigration in the Kingdom of Serbs, Croats and Slovenes/Yugoslavia marking 180th anniversary of Russian-Serbian Diplomatic Relations was organized in Alexander Solzhenitsyn House of Russian Abroad in Moscow on October 2nd 2018.Slobodan Mandić, Assistant Director of the Historical Archives of Belgrade participated in this event with a lecture Biographical Sources for the Russian Immigration History at the Historical Archives of Belgrade