Jean Piaget

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The Origin of the Idea of Chance in Children

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The Psychology of the Child

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The child's conception of number

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The place of the sciences of man in the system of s …

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Theorien und Methoden der modernen Erziehung

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To Understand Is to Invent

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Tratado de lógica y conocimiento científico. 2 Lógi …

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Understanding Causality

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child's conception of physical causality