Hanushek, Eric & Machin, Stephen & Woessmann, Ludger <br/><br/>
Handbook of The Economics of Education : Volume 4 

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 - North-Holland &Elsevier  2011 
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<br/><br/><label>ISBN: </label>  
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<br/><br/><label>Dewey Class. No.: </label>001.370  HAN.3