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181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aNational Airspace System$b[electronic resource] $eFAA has made progress but continues to face challenges in acquiring major air traffic control systems : report to congressional requesters /$fUnited States Government Accountability Office
210  1$a[Washington, D.C.] :$cU.S. Government Accountability Office,$d[2005]
300   $aTitle from title screen (viewed on July 19, 2005).
300   $a"June 2005."
300   $aPaper version available from: U.S. Government Accountability Office, 441 G St., NW, Rm. LM, Washington, D.C. 20548.
300   $a"GAO-05-331".
320   $aIncludes bibliographical references.
517   $aNational Airspace System 
606   $aNational Airspace System (U.S.)$xFinance$xForecasting
606   $aAir traffic control$zUnited States$xFinance$xForecasting
615  0$aNational Airspace System (U.S.)$xFinance$xForecasting.
615  0$aAir traffic control$xFinance$xForecasting.
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