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*035  $a(NO-LaBS)14278293(bibid)
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*1001 $aChay, Kenneth Y.$0(NO-TrBIB)3115455$_21337300
*24510$aAir quality, infant mortality, and the clean air act of 1970$cKenneth Y. Chay, Michael Greenstone
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2003
*300  $a43, [17] s.$bill.
*4901 $aWorking paper series / National Bureau of Economic Research$v10053
*7001 $aGreenstone, Michael$0(NO-TrBIB)2091877$_21337400
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v10053$w999105437124702201$_13074900
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