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*1001 $aPopp, David$0(NO-TrBIB)3033764$_26596300
*24510$aInternational innovation and diffusion of air pollution control technologies :$bthe effects of NOx and SO2 regulation in the U.S., Japan, and Germany$cDavid Popp
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2004
*300  $a49, [9] s.$bill.
*4901 $aWorking paper series / National Bureau of Economic Research$v10643
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v10643$w999105437124702201$_13074900
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