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harold e mehrens
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Cilt sonuçları
Aircraft in flight
Harold E. Mehrens · Civil Air Patrol]
58 sayfa · 1956
Aerodynamics / Aeronautics / Juvenile literature
Navigation and the weather
Harold E. Mehrens · Civil Air Patrol, U.S. Air Force
60 sayfa · 1957
Meteorology in aeronautics / Navigation (Aeronautics)