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035   $a(OCoLC)755271246
035   $a(EXLCZ)995470000002468524
100   $a20111002j198707    ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 13$aAn improved model of the Earth's gravitational field: *GEM-T1* /$fJ.G. Marsh [and seventeen others]
210  1$aGreenbelt, Maryland :$cNational Aeronautics and Space Administration, Goddard Space Flight Center,$dJuly 1987.
215   $a1 online resource (vi, 354 pages) $cillustrations, maps
225 1 $aNASA technical memorandum ;$v4019
300   $a"July 1987."
300   $a"Performing organization: Goddard Space Flight Center"--Report documentation page.
320   $aIncludes bibliographical references (pages 329-336).
517   $aImproved model of the Earth's gravitational field
606   $aEarth gravitation$2nasat
606   $aGeodesy$2nasat
606   $aGravitational fields$2nasat
606   $aLaser range finders$2nasat
606   $aSatellite tracking$2nasat
615  7$aEarth gravitation.
615  7$aGeodesy.
615  7$aGravitational fields.
615  7$aLaser range finders.
615  7$aSatellite tracking.
700   $aMarsh$b J. G.$01422387
712 02$aGoddard Space Flight Center,
801  0$bOCLCE
801  1$bOCLCE
801  2$bOCLCQ
801  2$bOCLCF
801  2$bOCLCO
801  2$bOCLCQ
801  2$bGPO
906   $aBOOK
912   $a9910707803903321
996   $aGEM-T1$93550243
997   $aUNINA