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100   $a20090626d1959      ca             0
101 0 $aeng
135   $aur|||||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
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200 10$aPeriodic orbits of a planetoid passing close to two gravitating masses /$fby Robert R. Newton
210  1$aWashington, D.C. :$cSmithsonian Institution,$d1959.
215   $a1 online resource (pages 69-78) $cillustrations
225 1 $aSmithsonian contributions to astrophysics ;$vvolume 3, number 7
320   $aIncludes bibliographical references (page 77).
606   $aAsteroids$xOrbits
606   $aAsteroids$xOrbits$2fast
615  0$aAsteroids$xOrbits.
615  7$aAsteroids$xOrbits.
700   $aNewton$b Robert R.$012395
712 02$aSmithsonian Astrophysical Observatory,
801  0$bMUU
801  1$bMUU
801  2$bOCLCQ
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912   $a9910709607803321
996   $aPeriodic orbits of a planetoid passing close to two gravitating masses$93547490
997   $aUNINA