(1980). ULTRA and the history of the United States Strategic Air Force in Europe vs. the German Air Force / by the U.S. Army Air Force.
Chicago-viite (17. p.)ULTRA and the History of the United States Strategic Air Force in Europe Vs. the German Air Force / by the U.S. Army Air Force. 1980.
MLA-viite (9. p.)ULTRA and the History of the United States Strategic Air Force in Europe Vs. the German Air Force / by the U.S. Army Air Force. 1980.
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