Text ( visual ) : unmediated Cognitive and motivational aspects of instruction : XXIInd International Congress of Psychology, Leipzig, GDR, July 6-12, 1980 : selected revised papers / edited by Robert Glaser and Joachim Lompscher. -- Amsterdam ; New York : North-Holland Pub. Co. ; New York, N.Y. : Sole distributors for the U.S.A. and Canada, Elsevier North-Holland , 1982. -- 189 p. : ill. ; 24 cm. -- Includes bibliographies. -- ISBN 0444863516 ; (BA06757684) ; https://ci.nii.ac.jp/ncid/BA06757684 Author Heading(s): International Congress of Psychology ; Glaser, Robert ; Lompscher, Joachim. -- Classification(s): LCC : LB1060 ; DC19 : 370.15/23. -- Subject Heading(s): LCSH : Learning, Psychology of -- Congresses ; LCSH : Motivation in education -- Congresses