Etiqueta de registo: 00283nx b22000973 45
001 333279
100 ## $a19890804apora0103 ba0
102 ## $aBE
152 ## $aRPC
210 12 $aWorld Congress of the International Association for the Advancement of Educational Research,$d7,$eGent, Belgium,$f1977
801 #0 $aPT$bBN
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