The Role of Technology in the Failure of the Rigid Airship as an Invention Role of Technology $4.95	The Romance of Aircraft Romance of Aircraft $4.95	The Second Boy's Book of Model Aeroplanes Second Boy's Book $4.95	The Short Empire Commercial Flying Boat NACA Report Short Empire $2.95
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The Theory and Practice of Model Aeroplaning Model Aeroplaning $4.95	The Vildebeest Aeroplane Pegasus I.M.3 Engine Pilot's Handbook vildebeest $9.95	Theorie und Berechnung Von Motor-Luftchiffen Motor-Luftchiffen $4.95	Theory of Aviation Instruction Paper - Part 1 Theory of Aviation $4.95