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100   $a20030910d1989----km-y0itay50------ba
101 0 $aeng
102   $aGB
200 1 $a<<The >>collected essays of Harvey Leibenstein$fedited by Kenneth Button
210   $aAldershot$cE. Elgar$dc1989
215   $a2 v.$d26 cm
463 \1$1001990003002500403321$12001 $a<<1. >>Population, development and welfare
463 \1$1001990003002510403321$12001 $a<<2. >>X-efficiency and micro-micro theory
700  1$aLeibenstein,$bHarvey$0103465
702  1$aButton,$bKenneth$f<1948- >
801  0$aIT$bUNINA$gRICA$2UNIMARC
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996   $aCollected essays of Harvey Leibenstein$9468613
997   $aUNINA