Military education. Army extension courses: Extension course of Air Corps schools, subcourse 20-11, Theory of bombing, 1932-33, examination, solutions.
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Military education. Army extension courses: Extension course of Air Corps schools, subcourse 20-11, Theory of bombing, 1932-33, examination, solutions.
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Military education. Army extension courses: Extension course of Air Corps schools, subcourse 20-11, Theory of bombing, 1932-33, examination, solutions.