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100   $a20030910d1991----km-y0itay50------ba
101 0 $aeng
102   $aUS
200 1 $aEconomic analysis of farm programs$fPeter G. Helmberger
210   $aNew York$cMcGraw-Hill$dinc.$d1991
215   $a300 p.$d25 cm
700  1$aHelmberger,$bPeter G.$0140671
801  0$aIT$bUNINA$gRICA$2UNIMARC
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952   $a62$bCSREAM 2180$fDAGEA
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996   $aEconomic analysis of farm programs$9394634
997   $aUNINA