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Air Pollution Issues Great Smoky Mountains National Park In EPA National Air Pollutant Emission Trends, 1990-1994., 1996.
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Clear: A Clearer Look at Eastern Air Resources. Denver, CO: National Park Service, 1993.
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Geologic Map and Structure Sections of the Great Smoky Mountains National Park and Vicinity Tennessee and North Carolina. Geological Survey Professional Paper 587 plate 1. Washinton, DC: U.S. Geological Survey, 1967.
Great Smoky Mountains National Park Cove Mountain: 1989 Gaseous Pollutant and Meteorological Monitoring Annual Data Summary. Denver, Co: U.S. Department of the Interior, National Park Service, 1992.
Great Smoky Mountains National Park Cove Mountain: 1990 Gaseous Pollutant and Meteorological Monitoring Annual Data Summary. Denver, Co: U.S. Department of the Interior, National Park Service, 1992.
Great Smoky Mountains National Park Look Rock: 1989 Gaseous Pollutant and Meteorological Monitoring Annual Data Summary. Denver, Co: National Park Service, 1992.
Great Smoky Mountains National Park Look Rock: 1990 Gaseous Pollutant and Meteorological Monitoring Annual Data Summary. Denver, CO: U.S. Department of the Interior, National Park Service, 1992.
Great Smoky Mountains National Park Look Rock: 2001 National Park Service Gaseous Air Pollutant Monitoring Network In Annual Data Summary. Lakewood, CO: National Park Service, 2001.
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U. S. Department of the Interior, Daniel M. Ogden, Hamilton K. Pyles, Theodore L. Swem, and Eldon F. Holmes. Trails for America: Report on the Nationwide Trails Study. U. S. Department of the Interior, Bureau of Outdoor Recreation, 1966.