Helicopter acoustics : proceedings of an International Specialists Symposium sponsored by the American Helicopter Society, Washington, D.C.; the U.S. Army Research Office, Durham, North Carolina; and the Langley Research Center, Hampton, Virginia, and held at Langley Research Center, May 22-24, 1978., by International Specialists Symposium on Helicopter Acoustics (1978 : Langley Research Center) et al.

Title:	Helicopter acoustics : proceedings of an International Specialists Symposium sponsored by the American Helicopter Society, Washington, D.C.; the U.S. Army Research Office, Durham, North Carolina; and the Langley Research Center, Hampton, Virginia, and held at Langley Research Center, May 22-24, 1978.
Author:	International Specialists Symposium on Helicopter Acoustics (1978 : Langley Research Center)
Author:	American Helicopter Society
Author:	United States. Army Research Office (Durham, N.C.)
Author:	Langley Research Center
Note:	National Aeronautics and Space Administration, Scientific and Technical Information Office ;, 1978

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Subject:	Acoustical engineering -- Congresses
Subject:	Helicopters -- Congresses
Subject:	Noise control -- Congresses
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