Dangos 1 - 1 canlyniadau o 1 ar gyfer chwilio 'Ruthven, Kenneth', amser ymholiad: 0.01e Mireinio'r Canlyniadau
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    The didactical challenge of symbolic calculators : turning a computational device into a mathematical instrument /
    gan Guin, Dominique. ed
    Cyhoeddwyd 2005
    Awduron Eraill: “...Ruthven, Kenneth...”
    Printed Book
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