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1.

図書
図書
1. The child's conception of geometry
by Jean Piaget, Bärbel Inhelder and Alina Szeminska ; translated from the French by E.A. Lunzer
出版情報: London : Routledge & K.Paul, 1960
シリーズ名: International library of psychology, philosophy and scientific method
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2.

図書
図書
2. Language, thought and personality in infancy and childhood
M. M. Lewis
出版情報: London : G. G. Harrap, 1963
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