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url: http://timerime.com/en/timeline/165261/Jonas+Salk+1914-1995/
2)"History of Salk - Salk Institute for Biological Studies." Salk Institute for Biological Studies. N.p., n.d. Web. 02 Dec. 2015.
url: http://www.salk.edu/about/history-of-salk/
3)Bio.com. A&E Networks Television, n.d. Web. 02 Dec. 2015.
url: http://www.biography.com/people/jonas-salk-9470147
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url: http://www.history.com/this-day-in-history/salk-announces-polio-vaccine
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url: http://www.notablebiographies.com/Ro-Sc/Salk-Jonas.html
6)"Jonas Salk Biography." -- Academy of Achievement. N.p., n.d. Web. 02 Dec. 2015.
url: http://www.achievement.org/autodoc/page/sal0bio-1
7)PBS. PBS, n.d. Web. 02 Dec. 2015.
url: http://www.pbs.org/wgbh/aso/databank/entries/bmsalk.html
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url: http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/pharmaceuticals/preventing-and-treating-infectious-diseases/salk-and-sabin.aspx
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url: http://www.pbs.org/wgbh/aso/databank/entries/dm52sa.html
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url: http://www.history.com/news/8-things-you-may-not-know-about-jonas-salk-and-the-polio-vaccine
url: http://timerime.com/en/timeline/165261/Jonas+Salk+1914-1995/
2)"History of Salk - Salk Institute for Biological Studies." Salk Institute for Biological Studies. N.p., n.d. Web. 02 Dec. 2015.
url: http://www.salk.edu/about/history-of-salk/
3)Bio.com. A&E Networks Television, n.d. Web. 02 Dec. 2015.
url: http://www.biography.com/people/jonas-salk-9470147
4)"Salk Announces Polio Vaccine." History.com. A&E Television Networks, n.d. Web. 02 Dec. 2015.
url: http://www.history.com/this-day-in-history/salk-announces-polio-vaccine
5)"Jonas Salk Biography." - Life, Family, Children, School, Mother, Information, Born, College, Time. N.p., n.d. Web. 02 Dec. 2015.
url: http://www.notablebiographies.com/Ro-Sc/Salk-Jonas.html
6)"Jonas Salk Biography." -- Academy of Achievement. N.p., n.d. Web. 02 Dec. 2015.
url: http://www.achievement.org/autodoc/page/sal0bio-1
7)PBS. PBS, n.d. Web. 02 Dec. 2015.
url: http://www.pbs.org/wgbh/aso/databank/entries/bmsalk.html
8)"Jonas Salk and Albert Bruce Sabin | Chemical Heritage Foundation." Jonas Salk and Albert Bruce Sabin | Chemical Heritage Foundation. N.p., n.d. Web. 02 Dec. 2015.
url: http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/pharmaceuticals/preventing-and-treating-infectious-diseases/salk-and-sabin.aspx
9:PBS. PBS, n.d. Web. 02 Dec. 2015.
url: http://www.pbs.org/wgbh/aso/databank/entries/dm52sa.html
10)"8 Things You May Not Know About Jonas Salk and the Polio Vaccine."History.com. A&E Television Networks, n.d. Web. 02 Dec. 2015.
url: http://www.history.com/news/8-things-you-may-not-know-about-jonas-salk-and-the-polio-vaccine