LEADER 01614oam  2200469 a 450 
001 9910702347903321
005 20121206153459.0
035   $a(CKB)5470000002426680
035   $a(OCoLC)820469938
035   $a(EXLCZ)995470000002426680
100   $a20121206d1988      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aVariable spectra of active galaxies$b[electronic resource] $efinal technical report /$fprepared by Jules P. Halpern
210  1$aMarshall Space Flight Center, AL :$cNational Aeronautics and Space Administration, George C. Marshall Space Flight Center,$d[1988]
215   $a1 online resource (xi, 119 pages) $cillustrations
225 1 $a[NASA contractor report] ;$vNASA-CR-182694
300   $aTitle from title screen (viewed on Dec. 6, 2012).
300   $a"May 1988."
300   $a"CAL-1683."
320   $aIncludes bibliographical references (pages 45-46).
517   $aVariable spectra of active galaxies 
606   $aActive galaxies$2nasat
606   $aX ray absorption$2nasat
606   $aX ray sources$2nasat
606   $aX ray spectra$2nasat
615  7$aActive galaxies.
615  7$aX ray absorption.
615  7$aX ray sources.
615  7$aX ray spectra.
700   $aHalpern$b Jules P$01411245
712 02$aGeorge C. Marshall Space Flight Center.
801  0$bGPO
801  1$bGPO
801  2$bGPO
906   $aBOOK
912   $a9910702347903321
996   $aVariable spectra of active galaxies$93501951
997   $aUNINA