%A International Congress of Psychology %A Glaser, Robert %A Lompscher, Joachim %T Cognitive and motivational aspects of instruction : XXIInd International Congress of Psychology, Leipzig, GDR, July 6-12, 1980 : selected revised papers %I North-Holland Pub. Co.,Sole distributors for the U.S.A. and Canada, Elsevier North-Holland %D 1982 %U https://ci.nii.ac.jp/ncid/BA06757684

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