Columbia subject headings:
Espionage, American--Russia (Federation)
Espionage, American--Soviet Union.
United States. Central Intelligence Agency.
Harvard subject headings:
Espionage, American--Soviet Union.
Espionage--Soviet Union.
Spies--Soviet Union.
United States. Central Intelligence Agency
Princeton subject headings:
Espionage, American--Soviet Union.
Espionage--Soviet Union.
Spies--Soviet Union.
United States. Central Intelligence Agency