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Hiam, C. Michael. Who the Hell Are We Fighting? The Story of Sam Adams and the Vietnam Intelligence Wars. South Royalton: Steerforth Press, 2006.
Moyar, Mark. Phoenix and the Birds of Prey: Counterinsurgency and Counterterrorism in Vietnam. Lincoln: University of Nebraska, 2007.
Shultz, Richard H. The Secret War Against Hanoi: Kennedy’s and Johnson’s Use of Spies, Saboteurs, and Covert Warriors in North Vietnam. New York: Harper Collins, 1999.