@article {6105,
	title = {Visible Foliar Injury Caused by Ozone Alters the Relationship between SPAD Meter Readings and Chlorophyll Concentrations in Cutleaf Coneflower},
	journal = {Photosynthesis Research},
	volume = {87},
	year = {2006},
	month = {March},
	pages = {281-286},
	keywords = {Air pollution, Flowering plants, Ozone},
	author = {Neufeld, Howard S and Chappelka, Arthur H and Somers, Greg L and Burkey, Kent O and Davidson, Alan W and Finkelstein, Peter L}
}
@proceedings {5350,
	title = {Ozone Biomonitoring Trend Plots and Surveys in Great Smoky Mountains National Park},
	journal = {Third Annual Southern Appalachian Man and the Biosphere Conference},
	year = {1992},
	month = {November},
	pages = {45},
	publisher = {Tennessee Valley Authority},
	address = {Gatlinburg, TN},
	keywords = {Air pollution, Ozone, Trees -- Growth decline, Vegetation monitoring},
	author = {Chappelka, Arthur H and Renfro, James R}
}
