ebrary, Inc, Hersh, M. A., Johnson, M. A., & Keating, D. (2008). Assistive technology for visually impaired and blind people. Springer.
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Chicago-čujuhus (17. p.)
ebrary, Inc, Marion A. Hersh, Michael A. Johnson, juo David Keating. Assistive Technology for Visually Impaired and Blind People. London: Springer, 2008.
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MLA-čujuhus (9. p.)
ebrary, Inc, et al. Assistive Technology for Visually Impaired and Blind People. Springer, 2008.
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