TY - BOOK ED - International Congress of Psychology ED - Glaser, Robert ED - Lompscher, Joachim TI - Cognitive and motivational aspects of instruction: XXIInd International Congress of Psychology Leipzig GDR July 6-12, 1980 SN - 0444863516 PY - 1982/// CY - Amsterdam PB - North-Holland KW - Educational psychology N1 - Includes bibliographies ER -