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100   $a20030910d1971----km-y0itay50------ba
101 0 $aeng
102   $aUS
105   $aa-------001yy
200 1 $aIntroductory economics$fRonald A. Wykstra
210   $aNew York [etc.]$cHarper & Row$dc1971
215   $aVII, 754 p.$d24 cm
610 0 $aEconomia$aStudi generali
700  1$aWykstra,$bRonald A.$0148974
801  0$aIT$bUNINA$gRICA$2UNIMARC
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952   $aC/1 WYK$b5598/I$fSES
959   $aSES
996   $aIntroductory economics$9468144
997   $aUNINA