“”Dam Hetch Hetchy!”: John Muir Contests the Hetch-Hetchy Dam.” HISTORY MATTERS – The U.S. Survey Course on the Web. Accessed April 11, 2018. http://historymatters.gmu.edu/d/5720/.
“Conservation versus Preservation?” Conservation versus Preservation? | US Forest Service. Accessed April 11, 2018. https://www.fs.fed.us/blogs/conservation-versus-preservation.
“John Muir: A Brief Biography.” John Muir Biography – John Muir Exhibit. Accessed April 11, 2018. https://vault.sierraclub.org/john_muir_exhibit/life/muir_biography.aspx.
“Brief Biography.” Brief Biography – Theodore Roosevelt Association. Accessed April 11, 2018. http://www.theodoreroosevelt.org/site/c.elKSIdOWIiJ8H/b.8684643/k.9DB0/Brief_Biography.htm.
“Theodore Roosevelt.” The White House. Accessed April 11, 2018. https://www.whitehouse.gov/about-the-white-house/presidents/theodore-roosevelt/.
“The Life of Theodore Roosevelt.” National Parks Service. Accessed April 11, 2018. https://www.nps.gov/thri/theodorerooseveltbio.htm.
“The Conservationist.” The Conservationist – Theodore Roosevelt Association. Accessed April 11, 2018. http://www.theodoreroosevelt.org/site/pp.aspx?c=elKSIdOWIiJ8H&b=8344385.
Pinchot, Gifford – Biography. Accessed April 11, 2018. https://www.pwrc.usgs.gov/resshow/perry/bios/PinchotGifford.htm.
Chrono-Biographical Sketch: Frank M. Chapman, people.wku.edu/charles.smith/chronob/CHAP1864.htm.
“Roosevelt, Robert Barnwell.” TR Center – Robert Barnwell Roosevelt, www.theodorerooseveltcenter.org/Learn-About-TR/TR-Encyclopedia/Family-and-Friends/Robert-Barnwell-Roosevelt.aspx.
“Laws, Policies & Regulations (U.S. National Park Service).” National Parks Service, U.S. Department of the Interior, www.nps.gov/aboutus/lawsandpolicies.htm.
“History Of State Forest Program.” History Of State Forest Program – NYS Dept. of Environmental Conservation, www.dec.ny.gov/lands/4982.html.
“Speech of President Roosevelt at laying of the cornerstones of gateway to Yellowstone National Park, Gardiner, Montana,” April 24, 1903. Theodore Roosevelt Papers. Library of Congress Manuscript Division. Theodore Roosevelt Digital Library. Dickinson State University, www.theodorerooseveltcenter.org/Research/Digital-Library/Record?libID=o289720.
“A Historical Perspective,” US Forest Service. www.fs.fed.us/forestmanagement/aboutus/histperspective.shtml
“Chronology of National Forest Management Laws and Regulations,” United States Department of Agriculture. www.fs.usda.gov/Internet/FSE_DOCUMENTS/fseprd530507.pdf
The USDA Forest Service: The First Century, USDA Forest Service Office of Communication, Washington, D.C., www.fs.fed.us/sites/default/files/media/2015/06/The_USDA_Forest_Service_TheFirstCentury.pdf
Slotkin, Richard. Gunfighter Nation: The Myth of the Frontier in Twentieth-Century America, Oklahoma, OK: Norman, 1998.
Lewis, R. W. B. The American Adam: Innocence, Tragedy, and Tradition in the Nineteenth Century. Chicago: University of Chicago Press, 1955.
Hine, Robert V., Faragher, John Mack, Coleman, Jon T. The American West: A New Interpretive History, Second Edition. New Haven: Yale University Press, 2017.
Mitchell, Jonathan. Revisions of the American Adam: Innocence, Identity and Masculinity in Twentieth-Century America. New York: Bloomsbury Publishing PLC, 2011.
“Gifford Pinchot National Forest: Early History,” USDA Forest Service Office of Communication, Washington, D.C., www.fs.usda.gov/Internet/FSE_DOCUMENTS/fsbdev3_004813.pdf
Williams, Gerald W. and Miller, Char. “At the Creation: The National Forest Commision of 1896-1897,” Pomona Faculty Publicaations and Research, (January 1, 2005).
Muir, John. “The American Forests.” The Atlantic. March 21, 2016. https://www.theatlantic.com/magazine/archive/1897/08/the-american-forests/305017/, (Reprint of Orginal).
Utley, Robert M., and Barry Mackintosh. “U.S. Department of the Interior: The Department of Everything Else.” National Parks Service. www.nps.gov/parkhistory/online_books/utley-mackintosh/interior1.htm.
“Forest Reserve Act (1891).” Whatwhenhow RSS. http://what-when-how.com/the-american-economy/forest-reserve-act-1891/.
Goetz, Kathryn R., and Molly Huber. “Land for Trees: The Timber Culture Act of 1873.” MinnPost. https://www.minnpost.com/mnopedia/2013/06/land-trees-timber-culture-act-1873.
“Timber Culture Act (1873).” Whatwhenhow RSS. 2018. http://what-when-how.com/the-american-economy/timber-culture-act-1873-2/.
“Timber Culture Act (1873).” Whatwhenhow RSS. http://what-when-how.com/the-american-economy/timber-culture-act-1873/.
“Timber and Stone Culture Act (1878).” Whatwhenhow RSS. http://what-when-how.com/the-american-economy/timber-and-stone-culture-act-1878-2/.
Curry-Roper, Janel M. “The Impact of the Timber and Stone Act on Public Land Ownership in Northern Minnesota.” Forest & Conservation History33, no. 2 (1989): 70-79.
“The Writings of John Muir.” Google Books. https://books.google.com/books?id=9T3QAAAAMAAJ&printsec=frontcover#v=onepage&q&f=fals.
Billington, Ray Allen, and Martin Ridge. Westward Expansion: A History of the American Frontier. Albuquerque: University of New Mexico Press, 2001.