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Children’s Developing Understanding of Place Value: Semiotic Aspects. (English)
Cogn. Instr. 15, No. 2, 265-86 (1997).
Classification: C31
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1
Semiotic Aspects of Cognitive Development: Illustrations from Early Mathematical Cognition. (English)
Psychol. Rev. 100, No. 3, 420-31 (1993).
Classification: C22
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