Columbia subject headings:
Soviet Union--Politics and government--1953-1985.
Soviet Union--Politics and government--1985-1991.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--History.
Harvard subject headings:
Princeton subject headings:
Soviet Union--Politics and government--1953-1985.
Soviet Union--Politics and government--1982-.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--History.