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Cognitive and motivational aspects of instruction
22. International Congress of Psychology, Leipzig, GDR, July 6 - 12, 1980 ; selected revised papers -
Cognitive and motivational aspects of instruction
22. International Congress of Psychology, Leipzig, GDR, July 6 - 12, 1980 ; selected revised papers -
Cognitive and motivational aspects of instruction
XXIInd Internat. Congr. of Psychology, Leipzig, GDR, July 6 - 12, 1980