@article {5129,
	title = {Air quality visibly improved in Great Smoky Mountains},
	volume = {2013},
	number = {April 3},
	year = {2013},
	note = {Video, Illustrations},
	month = {March 8, 2013},
	publisher = {WBIR},
	address = {Knoxville, TN},
	keywords = {Air pollution, Air quality, Visibility},
	url = {http://www.wbir.com/news/article/258451/2/Air-quality-visibly-improved-in-Smokies},
	author = {Matheny, Jim}
}
@article {5394,
	title = {Estimating the Impact of Impaired Visibility on the Demand for Visits to National Parks},
	journal = {Tourism Economics},
	volume = {19},
	year = {2013},
	month = {April},
	pages = {433-452},
	keywords = {Air pollution, Tourism, Visibility},
	author = {Poudyal, Neelam C and Paudel, Bamadev and Green, Gary T}
}
@article {5131,
	title = {Reducing Pollution at National Parks: Colorado State University Scientists Demonstrate Significant Improvements in Air Quality, Visibility},
	journal = {Department of Public Relations News \& Information},
	volume = {2013},
	number = {April 3},
	year = {2013},
	note = {Illustration},
	month = {March 7, 2013},
	publisher = {Colorado State University},
	keywords = {Air pollution, Air quality, Visibility},
	url = {http://www.news.colostate.edu/Release/6715},
	author = {Wilmsen, Emily Narvaes}
}
@article {5148,
	title = {Reanalysis of Archived IMPROVE PM2.5 Samples Previously Analyzed over a 15-Year Period},
	journal = {Environmental Science \& Technology},
	volume = {46},
	year = {2012},
	note = {Illustrations, Tables},
	month = {August},
	pages = {10106-10113},
	publisher = {American Chemical Society},
	keywords = {Air particles, Air pollution, Air quality, Visibility},
	author = {Hyslop, Nicole P and Trzepla, Krystyna and White, Warren H}
}
@article {3783,
	title = {Critique of "Precipitation in Light Extinction Reconstruction" by P.A. Ryan},
	journal = {Journal of the Air \& Waste Management Association},
	volume = {56},
	year = {2006},
	month = {May},
	pages = {539-546},
	keywords = {Acid rain, Air particles, Visibility},
	url = {http://www.environmental-expert.com/Files\%5C6477\%5Carticles\%5C6608\%5Cschichtel.pdf},
	author = {Schichtel, Bret A and Malm, William C and Pitchford, Marc L}
}
@article {4929,
	title = {Natural Background Visibility and Regional Haze Goals in the Southeastern United States},
	journal = {Journal of the Air \& Waste Management Association},
	volume = {55},
	year = {2005},
	note = {Maps, Tables},
	pages = {1600-1620},
	publisher = {Air \& Waste Management Association},
	chapter = {1600},
	address = {Pittsburg, PA},
	keywords = {Air particles, Air pollution, Air quality, Climate, Visibility},
	author = {Tombach, Ivar and Brewer, Patricia}
}
@article {6133,
	title = {Visibility and Other Air Quality Measurements Made at the Great Smoky Mountains National Park , 1980-1983},
	year = {1985},
	month = {January},
	institution = {Tennessee Valley Authority, Office of Natural Resources and Economic Development},
	address = {Muscle Shoals, Alabama},
	keywords = {Air pollution, Ozone, Visibility},
	issn = {TVA/ONRED/AWR-85/6},
	author = {Reisinger, Lawrence M and Valente, Ralph J}
}
@article {6184,
	title = {Data Summary Visibility and Ambient Air Quality in the Great Smoky Mountains National Park Research Project},
	year = {1983},
	note = {Full-text in Air Quality file in Park Library},
	month = {January},
	institution = {Tennessee Valley Authority, Air Quality Branch},
	address = {Muscle Shoals, Alabama},
	keywords = {Air pollution, Visibility},
	issn = {TVA.ONR/AQB-83/4},
	author = {Valente, Ralph J and Reisinger, Lawrence M}
}
@article {6136,
	title = {Quarterly Data Volume Visibility and Ambient Air Quality in the Great Smoky Mountains National Park Research Project April through June 1983},
	year = {1983},
	note = {Full-text in Air Quality file in Park Library},
	month = {August},
	pages = {122 },
	institution = {Tennessee Valley Authority, Office of Natural Resources},
	address = {Muscle Shoals, Alabama},
	keywords = {Air pollution, Visibility},
	author = {Valente, Ralph J and Reisinger, Lawrence M}
}
@article {6169,
	title = {A Study of Ambient Air Quality and Visibility in the Great Smoky Mountains National Park},
	year = {1982},
	month = {February},
	pages = {218},
	institution = {Virginia Polytechnic Institute and State University},
	address = {Blacksburg, VA},
	keywords = {Air pollution, Air quality, Ozone, Visibility},
	issn = {Final report, Contract no. CX500081549},
	author = {Thomas Stephens and David McCready}
}
