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• Figure 1: Sources of Helicopter Noise During Flights

  • Uploaded by: U.S. Government Accountability Office
  • License: United States Government Work
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  • Date uploaded: 2021-01-11
  • Tags: gao, governmentaccountabilityoffice, usgovernmentaccountabilityoffice, usgao, unitedstatesgovernmentaccountabilityoffice, government, congress, watchdog, oversight, governmentwatchdog, gao21200, aircraftnoise, faa, federalaviationadministration, nationalronaldreaganwashingtonnationalairport, helicopternoiseduringflights
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