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*1001 $aBeck, István$0(NO-TrBIB)90366549$_21089500
*24510$aTheory of ring system$cby Istvan Beck
*260  $a[Oslo]$c[1969]
*300  $a142 s.$c4°
*502  $aAvhandling (dr.grad) - Universitetet i Oslo, 1969
*533  $aElektronisk reproduksjon$b[Norge]$cNasjonalbiblioteket Digital$d2008-06-13
*85641$3Fulltekst$uhttps://urn.nb.no/URN:NBN:no-nb_digibok_2008061300025$yNettbiblioteket$zDigital representasjon
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