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1 R. C. Payne, Noise Levels from Propeller-Driven Aircraft Measured at Ground Level and at 1.2 m above the Ground [i] (1987)

handle is hein.space/nslvsfm0001 and id is 1 raw text is: 









PB88-115985


  Noise Levels fron Propeller-Driven
  Aircraft MeassireJ at Ground Level and at
  1.2 m Above: the Ground





  National Physiral Lab., Teddington (England)
I












  1987