References
http://www.biography.com/people/helen-keller-9361967?page=1
http://www.thefamouspeople.com/profiles/helen-keller-201.php
http://www.nytimes.com/learning/general/onthisday/bday/0627.html
http://en.wikipedia.org/wiki/Helen_Keller
http://www.goodhousekeeping.com/family/inspirational-people/facts-about-helen-keller