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Noise Measurement Flight Test: Data/Analyses Aerospatiale AS 355F TwinStar Helicopter
Noise Measurement Flight Test: Data/Analyses Bell 222 Twin Jet Helicopter
Noise Measurement Flight Test for Boeing Vertol 234/CH 47-D Helicopter: Data/Analyses
Noise Measurement Flight Test: Data/Analyses, Sikorsky S-76A Helicopter
Noise Measurement Flight Test: Data/Analyses Aerospatiale AS 350D AStar Helicopter
Noise Measurement Flight Test: Data/Analyses, Hughes 500 D/E Helicopter