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A Study of Ambient Air Quality and Visibility in the Great Smoky Mountains National Park. Blacksburg, VA: Virginia Polytechnic Institute and State University, 1982.
Data Summary Visibility and Ambient Air Quality in the Great Smoky Mountains National Park Research Project. Muscle Shoals, Alabama: Tennessee Valley Authority, Air Quality Branch, 1983.
Quarterly Data Volume Visibility and Ambient Air Quality in the Great Smoky Mountains National Park Research Project April through June 1983. Muscle Shoals, Alabama: Tennessee Valley Authority, Office of Natural Resources, 1983.
Visibility and Other Air Quality Measurements Made at the Great Smoky Mountains National Park , 1980-1983. Muscle Shoals, Alabama: Tennessee Valley Authority, Office of Natural Resources and Economic Development, 1985.
"Natural Background Visibility and Regional Haze Goals in the Southeastern United States." Journal of the Air & Waste Management Association 55, no. 11 (2005): 1600-1620.
"Critique of "Precipitation in Light Extinction Reconstruction" by P.A. Ryan." Journal of the Air & Waste Management Association 56, no. 5 (2006): 539-546.
"Reanalysis of Archived IMPROVE PM2.5 Samples Previously Analyzed over a 15-Year Period." Environmental Science & Technology 46, no. 18 (2012): 10106-10113.
Air quality visibly improved in Great Smoky Mountains. Vol. 2013. Knoxville, TN: WBIR, 2013.
"Estimating the Impact of Impaired Visibility on the Demand for Visits to National Parks." Tourism Economics 19, no. 2 (2013): 433-452.
Reducing Pollution at National Parks: Colorado State University Scientists Demonstrate Significant Improvements in Air Quality, Visibility In Department of Public Relations News & Information. Vol. 2013. Colorado State University, 2013.
