Proceedings of the aircraft noise symposium : acoustical duct treatments for aircraft ; 8. April 1969, Philadelphia, Pennsylvania
Aircraft Noise Symposium ; 1969 ; Philadelphia, PA Aircraft Noise Symposium (Philadelphia, PA) : 1969.04.08
Journal of the Acoustical Society of America ; 48.1970,3,3
1970
S. 779 - 842
Ill., graph. Darst.
Conference Proceedings
English
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