Novai͡a sovetskai͡a i inostrannai͡a literatura po obshchestvennym naukam. Bolgarii͡a - Institut nauchnoĭ informat︠s︡ii po obshchestvennym naukam (Akademii︠a︡ nauk SSSR) (Moskva : INION, 1990)
Mode of access: Internet.
Keywords: Bulgaria -- Bibliography -- Periodicals