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*1001 $aFrenger, Petter$0(NO-TrBIB)90277421$_36786300
*24514$aThe directional direct elasticity of substitution and duality$cby Petter Frenger
*260  $a[Oslo]$bDepartment of Economics, University of Oslo$c1994
*300  $a28 s.$bdiagr.
*4901 $aMemorandum from Department of Economics, University of Oslo$v7, May 1994
*830 0$aMemorandum (Universitetet i Oslo. Sosialøkonomisk institutt : trykt utg.)$x0801-1117$v7, May 1994$w998120437074702201$_11432400
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