Military education. Army extension courses: Extension course of Air Corps schools, subcourse 20-12, Air Corps combat orders, 1931-32, introduction and lesson 1-8.
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Military education. Army extension courses: Extension course of Air Corps schools, subcourse 20-12, Air Corps combat orders, 1931-32, introduction and lesson 1-8.
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Military education. Army extension courses: Extension course of Air Corps schools, subcourse 20-12, Air Corps combat orders, 1931-32, introduction and lesson 1-8.