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101 0 $aeng
102   $aDE
105   $ay-------001yy
200 1 $aDegrees of unsolvability$estructure and theory$fRichard L. Epstein
210   $aBerlin [etc.]$cSpringer-Verlag$d1979
215   $aXIV, 240 p.$cill.$d24 cm
225 1 $aLecture notes in mathematics$v759
610 0 $aLogica
610 0 $aRicorsività
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700  1$aEpstein,$bRichard L.$046609
801  0$aIT$bUNINA$gRICA$2UNIMARC
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996   $aDegrees of unsolvability$981037
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