REFERENCES
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2.US National Library of Medicine. 14 November 2016. Artificial Limbs. Retrieved from https://medlineplus.gov/artificiallimbs.htm
3. Steve Brachmann. 1 December 2016. The Evolution of Prosthetic Devices: A Patent History. Retrieved from
http://www.ipwatchdog.com/2014/12/01/the-evolution-of-prosthetic-devices-a-patent-hist
4.Kim M. Norton. December 2007. A Brief History of Prosthetics. Retrieved from http://www.amputee-coalition.org/resources/a-brief-history-of-prosthetics/
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