01356nam 2200361 a 450 991069638170332120080102131707.0(CKB)5470000002377011(OCoLC)186456051(EXLCZ)99547000000237701120080102d2007 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierAir traffic control[electronic resource] FAA reports progress in system acquisitions, but changes in performance measurement could improve usefulness of information : report to congressional requesters[Washington, D.C.] :U.S. Govt. Accountability Office,[2007]ii, 33 pages digital, PDF fileTitle from title screen (viewed on Dec. 31, 2007)."December 2007."Paper version available from: U.S. Govt. Accountability Office, 441 G St., NW, Rm. LM, Washington, D.C. 20548."GAO-08-42."Includes bibliographical references.Air traffic control Air traffic controlUnited StatesPlanningAir traffic controlPlanning.GPOGPOBOOK9910696381703321Air Traffic Control2049120UNINA