REFERENCES:
John Muir. (2014). John Muir Biography. Retrieved from http://www.biography.com/people/john-muir-9417625#synopsis
Schauer, S., Schauer, C. (2014). John Muir Trail. Yosemite Valley to Mt. Whitney. Retrieved from http://johnmuirtrail.org/
Sierra Club. (NA). John Muir: A Brief Biography. Retrieved from http://vault.sierraclub.org/john_muir_exhibit/life/muir_biography.aspx
St. Rosemary Educational Institution. (2014). John Muir Biography and Contributions. Retrieved from http://schoolworkhelper.net/john-muir-biography-contributions/
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