People who visit www.textbooksfree.org also visit websites:

Academicearth.org

http://academicearth.org/

Bibliomania.com

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Bookboon.com

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Creativecommons.org

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Rong-chang.com

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Globusz.com

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Globaltext.org

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Hippocampus.org

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Ilumina-dlib.org

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Jhsph.edu

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Intmath.com

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Mit.edu

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Nap.edu

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Pinkmonkey.com

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Sparknotes.com

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Ted.com

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Textbookrevolution.org

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Theassayer.org

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Tufts.edu

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Videolectures.net

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Wikibooks.org

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Web-books.com

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Berkeley.edu

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Academicearth.org

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Courserepository.org

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Ocwconsortium.org

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Fhda.edu

http://sofia.fhda.edu/

Stanford.edu

http://itunes.stanford.edu/

Uocwa.org

http://uocwa.org/

Uccp.org

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Uci.edu

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Usq.edu.au

http://ocw.usq.edu.au/

Ilrn.com

http://www.ilrn.com/

Educommons.com

http://educommons.com/

Opentextbook.org

http://www.opentextbook.org/

Opendefinition.org

http://www.opendefinition.org

Wordpress.com

http://cccoer.wordpress.com

Freetextbookproject.org

http://www.freetextbookproject.org/

Theorangegrove.org

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Ck12.org

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Cnx.org

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Opensourcetext.org

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Oercommons.org

http://oercommons.org

Socialbib.com

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Worldlibrary.net

http://worldlibrary.net/

Teleread.org

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Freecurricula.org

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Okfn.org

http://www.okfn.org

Typepad.com

http://globaltext.typepad.com/

Web-stat.com

http://www.web-stat.com

Voef.org

http://www.voef.org/