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100   $a20000920d1987----km-y0itay50------ba
101 0 $aeng
200 1 $aRecursively Enumerable Sets and Degrees$eA Study of Computable Functions and Computability Generated Sets$fRobert I. Soare
210   $aBerlin [etc.]$cSpringer-Verlag$d1987
215   $axviii, 437 p.$d25 cm
225 1 $aPerspectives in mathematical logic
610 0 $aLogica
610 0 $aRicorsività
676   $a160
700  1$aSoare,$bRobert I.$052373
801  0$aIT$bUNINA$gRICA$2UNIMARC
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