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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 acquisition : studies in first language development
edited by Paul Fletcher and Michael Garman
出版情報: Cambridge ; New York : Cambridge University Press, 1979
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