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*520  $aPISA står for: Programme for International Student Assessment
*590 0$aHenningsen, Inge. - I: Tangenten. - Årg. 20, nr. 2 (2009). - S. 59-62, 54
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*773  $tTangenten$gÅrg. 19, nr. 4 (2008)$x0802-8192$w(NO-LaBS)552650(tnr)
*999  $z800440600$anorart:800440600
^