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Cline, Ray S. Washington Command Post: The Operations Division. U.S. Army in World War II. Washington, D.C.: Department of the Army, 1951, chs. 1–4.
Gabel, Christopher R. The U.S. Army GHQ Maneuvers of 1941. Wash- ington, D.C.: U.S. Army Center of Military History, 1991.