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*24500$aLonger term effects of head start
*260  $aCambridge, Mass.$bNBER$c2000
*300  $a21, [3] s.
*4901 $aNBER working paper series$v8054
*7001 $aCurrie, Janet$_36007500
*7001 $aGarces, Eliana$_82660300
*7001 $aThomas, Duncan$_65943100
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v8054$w999105437124702201$_13074900
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