Biography, H. K. (2013). AFB: Expanding Possibilities for People with Vision Loss. Retrieved March 7, 2013, from American Foundation for the Blind

          Website: http://www.afb.org/section.aspx?FolderID=1&SectionID=1&TopicID=129&DocumentID=1351

Biography, H. K. (2013). Bio.TrueStory. Retrieved March 7, 2013, from Biography Channel Website: http://www.biography.com/people/helen-keller-9361967

Dahl, H. (1965, July). Observations on a "Natural Experiment:" Helen Keller. Journal of the American Psychoanalytic Association, 13(3), 535-536.

Johnson, & Thompson. (2007, August). Ask Keller. Retrieved March 7, 2013, from American Foundation for the Blind: Braille Bug:

           http://www.braillebug.org/askkeller.asp?issueid=20078

Neilson, K. (2004). The Radical Lives of Helen Keller. In K. Neilson, Sign Language Studies (pp. 248-255). New York: New York University Press.

Press, A. (2002, October 13). Quarter Honoring Helen Keller will include her name in Braille. Milwaukee Journal Sentinel. Birmingham, Alabama, United

          States of America: Journal Sentinel.

Simkin, J. (2012). Helen Keller. Retrieved March 7, 2013, from Sparticus Educational Website: http://www.spartacus.schoolnet.co.uk/USAkeller.htm#source

Weatherford, D. (1994). Helen Keller. Retrieved March 7, 2013, from National Women's History Museum Website:

          http://www.nwhm.org/education-resources/biography/biographies/helen-keller/