LEADER 01544nam  2200397Ia 450 
001 9910701359003321
005 20120524125945.0
035   $a(CKB)5470000002417477
035   $a(OCoLC)794231329
035   $a(EXLCZ)995470000002417477
100   $a20120524d2009      ua             0
101 0 $aeng
135   $aurcn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 00$aSubsurface evaluation of railway track using ground penetrating radar$b[electronic resource]
210  1$aWashington, D.C. :$cU.S. Department of Transportation, Federal Railroad Administration, Office of Research and Development,$d[2009]
215   $a1 online resource (x, 106 pages) $ccolor illustrations
300   $aTitle from title screen (viewed May 24, 2012).
300   $a"April 2009."
320   $aIncludes bibliographical references (pages 103-105).
606   $aRailroads$zUnited States$xMaintenance and repair
606   $aBallast (Railroads)$xInspection$zUnited States
606   $aGround penetrating radar
615  0$aRailroads$xMaintenance and repair.
615  0$aBallast (Railroads)$xInspection
615  0$aGround penetrating radar.
701   $aRoberts$b Roger$01418702
712 02$aUnited States.$bFederal Railroad Administration.$bOffice of Research and Development.
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910701359003321
996   $aSubsurface evaluation of railway track using ground penetrating radar$93530911
997   $aUNINA