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*1001 $aJacob, Brian A.$0(NO-TrBIB)2057912$_30576300
*24510$aThe impact of teacher training on student achievement :$bquasi-experimental evidence from school reform efforts in Chicago$cBrian A. Jacob, Lars Lefgren
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2002
*300  $a39 s.
*4901 $aWorking paper series / National Bureau of Economic Research$v8916
*7001 $aLefgren, Lars$0(NO-TrBIB)2057910$_30576400
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v8916$w999105437124702201$_13074900
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