The digital library of the Russian Geographical Society, containing thousands of digitized books, maps, atlases, periodicals, expedition reports, and other types of materials of the Society.
Digital collection of documents and materials about Vladimir Vernadsky, including his publications, personal correspondence, diary entries, memoirs, relevant archival documents, etc.
Digital library of the National Library of the Republic of Karelia, containing many digitized local publications of the Soviet period. It also has a lot of publications and manuscripts in Finnish language.
Digital library of the Russian Academy of Sciences that provides open access to extensive digitized academic publications as well as relevant archival documents, museum objects, and photographs.
Digital portal that provides open access to archival documents, books, and periodicals relevant to Aktobe Oblast in Kazakhstan. Here you can find thematic collections of archival documents, Soviet-era local periodical issues, as well as books and various referential materials.