Educators Weigh E-Textbook Cost Comparisons

http://www.edweek.org/ew/articles/2012/05/09/30etextbooks_ep.h31.html?tkn=SLOFi0Y2DW/eunNuPwbgLTcQnvVHGdFmYR3D&cmp=ENL-EU-NEWS1

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