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Development of rotorcraft interior noise control concepts phase III, development of noise control co

Yoerkie, C. A., author.
Stratford, CT United Technologies Corporation, Sikorsky Aircraft Division ; Cambridge, MA : Cambrldge Collaborative, Inc. ; Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center, [1987] 1987

Study of noise transmission through double wall aircraft windows

Vaicaitis, R.
Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center, [1983] 1983

Variable-speed induction motor drives for aircraft environmental control compressors

Mildice, J. W., author.
Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, July 1996. 1996-