Great Soviet Encyclopedia . A.M. Prokhorov, ed. 31 vols. Strayer, Joseph R., gen. Dictionary of the Middle Ages . A major reference source in this area.
Bibliographies are mostly in English.
Weber, H. ed. The Modern Encyclopedia of Russian and Soviet Literatures. Academic International, 1977- . The encyclopedia strives, ultimately, to arrive at a cultural profile of Russia and the Soviet Union, as revealed in Russian literature, in the many other national Soviet literatures, and in their literary traditions and literary history. Wieczynski, Joseph L., ed.