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Incoming Resources
- Spies of the American Revolution, an interactive espionage adventure, by Elizabeth Raum ; consultant, Richard Bell, PhD, Associate Professor of History, University of Maryland, College Park
- Spies of World War I, an interactive history adventure, by Michael Burgan
- Stealing Nazi secrets in World War II, an interactive espionage adventure, by Elizabeth Raum
- Spies of the Civil War, an interactive history adventure, by Michael Burgan