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