By Robert T. Harger   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|34|3|459-463

Taylor & Francis Ltd‎(2003)‎

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By Robert T. Harger   Melinda E. Harvey   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|34|6|949-951

Taylor & Francis Ltd‎(2003)‎

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