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Ozone Injury on Cutleaf Coneflower (Rudbeckia laciniata) and Crown-Beard (Verbesina occidentalis) in Great Smoky Mountains National Park." Environmental Pollution 125, no. 1 (2003): 53-59.
"Ozone Biomonitoring Trend Plots and Surveys in Great Smoky Mountains National Park In Third Annual Southern Appalachian Man and the Biosphere Conference. Gatlinburg, TN: Tennessee Valley Authority, 1992.