Limbaugh, Ronald. “John Muir and the Mining Industry.” Mining History Association, 1996, http://www.mininghistoryassociation.org/Journal/MHJ-v3-1996-Limbaugh.pdf.
Muir, John. My First Summer in the Sierra. Houghton Mifflin, 1911.
Muir, John. Our National Parks. Houghton Mifflin, 1901.
Worster, Donald. A Passion for Nature: The Life of John Muir. Oxford University Press, 2011.
Sunshine's Field Notes 