Columbia subject headings:
Intelligence service--Soviet Union--History.
Secret service--Soviet Union--History.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--History.
Harvard subject headings:
Intelligence service--Soviet Union--History.
Secret service--Soviet Union--History
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--History.
Princeton subject headings:
Police--Soviet Union.