Columbia subject headings:
Hungary--History--Revolution, 1956--Sources.
Hungary--Military relations--Soviet Union--Sources.
Hungary--Politics and government--1945-1989--Sources.
Soviet Union--Military relations--Hungary--Sources.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--Archives.
Soviet Union. Ministerstvo vnutrennikh del--Archives.
Harvard subject headings:
Hungary--History--Revolution, 1956--Sources
Soviet Union--Foreign relations--1953-1975--Sources.
Princeton subject headings: