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100   $a20030910d1963----km-y0itay50------ba
101 0 $aeng
102   $aUS
200 1 $aResource demand and structure of the agricultural industry$fEarl O. Heady, Luther G. Tweeten
210   $aAmes, Iowa$cIowa State University Press$d1963
215   $aix, 515 p.$cill.$d24 cm
610 0 $aEconomia agraria
700  1$aHeady,$bEarl Orel$f<1916- >$079005
701  1$aTweeten,$bLuther$072099
801  0$aIT$bUNINA$gRICA$2UNIMARC
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996   $aResource demand and structure of the agricultural industry$9514471
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