• “Air Quality.” National Parks Service, U.S. Department of the Interior, www.nps.gov/grsm/learn/nature/air-quality.htm./

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• “Clingman's Dome: History: Thomas Lanier Clingman: Video.” Great Smoky Mountains National Park, 23 Apr. 2020, mysmokymountainguide.com/gsmnp/clingmans-dome/

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• “Clingmans Dome.” Clingmans Dome - Great Smoky Mountains National Park, www.clingmansdome.com/

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• “Clingmans Dome.” National Parks Service, U.S. Department of the Interior, 4 Mar. 2020, www.nps.gov/grsm/planyourvisit/clingmansdome.htm.

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• “Clingmans Dome Observation Tower (U.S. National Park Service).” National Parks Service, U.S. Department of the Interior, www.nps.gov/places/clingmans-dome-observation-tower.htm#:~:text=Clingmans Dome Tower was constructed,of the National Park Service.

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• “Great Smoky Mountains National Park: CLINGMANS DOME OVERLOOK TRAIL.” National Park Planner, 15 Mar. 2020, npplan.com/parks-by-state/north-carolina-national-parks/great-smoky-mountains-national-park-park-at-a-glance/great-smoky-mountains-national-park-clingmans-dome-region/great-smoky-mountains-national-park-clingmans-dome-overlook-trail/.

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• pls4e. “Clingmans Dome Observation Tower.” SAH ARCHIPEDIA, 24 Sept. 2019, sah-archipedia.org/buildings/TN-01-155-0018.