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person:("John, P.")

    Experiments in External Noise Reduction of Light Airplanes

    Beranek, Leo L / Elwell, Fred S / Roberts, John P | NTRS | 1950

    Initial results of instrument-flying trials conducted in a single-rotor helicopter

    Crim, Almer D. / Reeder, John P. / Whitten, James B. | TIBKAT | 1953