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Hersh, Marion A., Michael A. Johnson, David. Keating, and SpringerLink. Assistive Technology for Visually Impaired and Blind People. London: Springer, 2008. Print.
Scrosati, Bruno., K. M. Abraham, Walter A. Van. Schalkwijk, and Jusef. Hassoun. Lithium Batteries Advanced Technologies and Applications. Hoboken: Wiley, 2013. The ECS Ser. of Texts and Monographs. Web.