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100   $a20090706d2009      ua             0
101 0 $aeng
135   $aurmn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aAviation safety$b[electronic resource] $eNASA's National Aviation Operations Monitoring Service project was designed appropriately, but sampling and other issues complicate data analysis : report to congressional requesters
210  1$a[Washington, D.C.] :$cU.S. Govt. Accountability Office,$d[2009]
215   $aii, 95 pages $cdigital, PDF file
300   $aTitle from title screen (viewed on July 1, 2009).
300   $a"March 2009."
300   $a"GAO-09-112."
320   $aIncludes bibliographical references.
517   $aAviation safety 
606   $aAirlines$zUnited States$xSafety measures
606   $aAeronautics$zUnited States$xSafety measures
615  0$aAirlines$xSafety measures.
615  0$aAeronautics$xSafety measures.
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910698951403321
996   $aAviation safety$92313029
997   $aUNINA