Motivaatio, leikki ja toiminnan kohteellisuus : = Motivation, play and object-orientation of activity / Pentti Hakkarainen
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| Place / Publishing House: | Helsinki : Orienta-Konsultit Oy, 1990 |
| Year of Publication: | 1990 |
| Language: | Finnish |
| Classification: | 77.45 - Motivationspsychologie |
| Physical Description: | 300 S.; graph. Darst.; 21 cm |
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