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Subject
- United States. Federal Bureau of Investigation104
- History16
- Intelligence service12
- United States. Central Intelligence Agency12
- Hoover, J. Edgar (John Edgar), 1895-197210
- Espionage7
- Crime6
- Criminals6
- Officials and employees6
- Espionage, Soviet5
- Government executives5
- Intelligence officers5
- Investigation5
- Police5
- Political crimes and offenses5
- Criminal investigation4
- Subversive activities4
- Ames, Aldrich Hazen, 1941-3
- Espionage, Russian3
- Identification3