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Subject
- Aeronautics.[remove]5
- Airplane racing--United States.2
- Airplanes.2
- Aeronautical engineers.1
- Aeronautical sports.1
- Aircraft industry.1
- Airplanes--Piloting.1
- Airplanes--Speed records.1
- Autogiro Company of America.1
- Autogiros.1
- Avro airplanes.1
- Biplanes--Piloting.1
- Biplanes.1
- Cierva, Juan de la, 1895-1936.1
- Daredevils.1
- Engineering.1
- Gliders (Aeronautics)1
- Helicopters.1
- Inventions.1
- Lindbergh, Charles A. (Charles Augustus), 1902-1974.1