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Espionage (Topical Term)
Used for/see from:
- Covert operations (Espionage)
- Operations, Undercover (Espionage)
- Spying
- Undercover operations (Espionage)
See also:
- Broader heading: Intelligence service
- Spies
Google search, Nov. 16, 2005 (the terms "undercover operations" and "covert operations" are used in the fields of both espionage and criminal investigation.)