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100   $a20030910d1991----km-y0itay50------ba
101 0 $aeng
102   $aGB
200 1 $a<<The >>economic theory of product differentiation$fJohn Beath, Yannis Katsoulacos
210   $aCambridge$cCambridge University Press$d1991
215   $a204 p.$d24 cm
700  1$aBeath,$bJohn$088875
702  1$aKatsoulacos,$bY. S.$f<1953- >
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996   $aEconomic theory of product differentiation$9394603
997   $aUNINA