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Rydell, Kiki Leigh; Mary Shivers Culpin. Mission 66 in Yellowstone National Park 1941–1965(PDF). A History of Administrative Development in Yellowstone National Park, 1872–1965. Yellowstone National Park. 2006-07-05 [2013-05-27]. (原始内容(PDF)存档于2007-06-16).
Rocky Mountain Wolf Recovery 2005 Interagency Annual Report(PDF). U.S. Fish and Wildlife Service, Nez Perce Tribe, National Park Service, Montana Fish, Wildlife & Parks, Idaho Fish and Game, and USDA Wildlife Services. 2006 [2013-05-27]. (原始内容存档(PDF)于2007-06-16).
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cr.nps.gov
Haines, Aubrey L. The Lewis and Clark Era (1805–1814). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. The Fur Trade Era (1818–42). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. The Exploring Era (1851–63). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 1975 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. The Folsom Party (1869). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. Cornelius Hedges. Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-03-20).
Allaback, Sarah. Mission 66 Visitor Centers. U.S. Department of the Interior. 2000 [2013-05-27]. (原始内容存档于2001-04-19).
Haines, Aubrey L. The Lewis and Clark Era (1805–1814). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. The Fur Trade Era (1818–42). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. The Exploring Era (1851–63). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 1975 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. The Folsom Party (1869). Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-09-23).
Haines, Aubrey L. Cornelius Hedges. Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. 2000 [2013-12-01]. (原始内容存档于2013-03-20).
Rydell, Kiki Leigh; Shivers Culpin, Mary. The Administrations of Nathaniel Langford and Philetus Norris(PDF). A History of Administrative Development in Yellowstone National Park, 1872–1965. Yellowstone National Park. 2006-07-05 [2011-09-30]. (原始内容(PDF)存档于2011-09-30).
Rydell, Kiki Leigh; Mary Shivers Culpin. Mission 66 in Yellowstone National Park 1941–1965(PDF). A History of Administrative Development in Yellowstone National Park, 1872–1965. Yellowstone National Park. 2006-07-05 [2013-05-27]. (原始内容(PDF)存档于2007-06-16).
Allaback, Sarah. Mission 66 Visitor Centers. U.S. Department of the Interior. 2000 [2013-05-27]. (原始内容存档于2001-04-19).
Rocky Mountain Wolf Recovery 2005 Interagency Annual Report(PDF). U.S. Fish and Wildlife Service, Nez Perce Tribe, National Park Service, Montana Fish, Wildlife & Parks, Idaho Fish and Game, and USDA Wildlife Services. 2006 [2013-05-27]. (原始内容存档(PDF)于2007-06-16).