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- catalog contributor b2118730.
- catalog created "1988.".
- catalog date "1988".
- catalog date "1988.".
- catalog dateCopyrighted "1988.".
- catalog extent "57 p. ;".
- catalog identifier "8773041831".
- catalog isPartOf "Historisk-filosofiske meddelelser, 0106-0481 ; 54".
- catalog issued "1988".
- catalog issued "1988.".
- catalog language "eng".
- catalog publisher "Copenhagen : Royal Danish Academy of Sciences and Letters : Commissioner, Munksgaard,".
- catalog subject "Play Psychological aspects.".
- catalog subject "Play behavior in animals.".
- catalog subject "Problem solving.".
- catalog title "Why children and young animals play : a new theory of play and its role in problem solving / by Arne Friemuth Petersen.".
- catalog type "text".