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100   $a20000920d1990----km-y0itay50------ba
101 0 $aeng
200 1 $aGeneral Relativity and Gravitation, 1989$eProceedings of the 12th International Conference, University of Colorado at Boulder, July 2-8, 1989$fEdited by Neil Ashby, David F. Bartlett and Walter Wyss
210   $aCambridge [etc.]$cCambridge University Press$d1990
610 0 $aRelatività
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700  1$aAshby,$bNeil$052778
702  1$aBartlett,$bDavid F.
702  1$aWyss,$bWalter
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