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Subject
- History3
- Intelligence service3
- Administrative agencies1
- American Legion1
- Communism and motion pictures1
- Espionage, American1
- Executive departments1
- Hoover, J. Edgar (John Edgar), 1895-19721
- Management1
- National Security Archive (U.S.)1
- National security1
- Radicalism in mass media1
- United States. Central Intelligence Agency1
- United States. Federal Bureau of Investigation1