Resource on the demography of tsarist and Soviet Russia compiled by two academics, Aleksandr Avdeev of Moscow State University and Alain Blum of Institut national d'études démographiques and the Ecole des Hautes Etudes en sciences sociales. It contains a number of demographic data and maps.
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.