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Jean Piaget 9.8.1896-16.9.1980
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Jean Piaget 9.8.1896-16.9.1980
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Jean Piaget 9.8.1896-16.9.1980
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Helkama, Klaus
Helkama, Klaus
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Published in:
Psykologia
15(1980) : 5, s. 283-286
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Language
Finnish
Classification
udkx 159.9
udkx 92
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Piaget, Jean.
Piaget, Jean.
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