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*1001 $aKeller, Wolfgang$0(NO-TrBIB)1041754$_42549700
*24514$aThe origins of spatial interaction$cWolfgang Keller, Carol H. shiue
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2003
*300  $a32, [16] s.$bill.
*4901 $aWorking paper series / National Bureau of Economic Research$v10069
*7001 $aShiue, Carol H.$0(NO-TrBIB)4000129$_72187700
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v10069$w999105437124702201$_13074900
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