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Lederman, S. J., & Campbell, J. I. (1983). Tangible line graphs: An evaluation and some systematic strategies for exploration. Journal of Visual Impairment & Blindness , 77 (3), 108-112.
Lederman, S. J., & Campbell, J. I. (1983). Tangible line graphs: An evaluation and some systematic strategies for exploration. Journal of Visual Impairment & Blindness, 77(3), 108-112.
