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*1001 $aHeck, Arch O.$0(NO-TrBIB)90927984$_101334000
*24514$aThe education of exceptional children :$bits challenge to teachers, parents and laymen$cby Arch O. Heck
*260  $aNew York$bMcGraw-Hill$c1940
*300  $aXVIII, 536 s.$bill.
*4901 $aMcGraw-Hill series in education
*830 0$aMcGraw-Hill series in education$_13324900
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