By Croft A. C.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|31|3|431-446

Taylor & Francis Ltd‎(2000)‎

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By Croft A. C.   Harrison M. C.   Robinson C. L.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|40|1|109-125

Taylor & Francis Ltd‎(2009)‎

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