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2. Chappelka, A.H., Hildebrand, E.A., Skelly, J.M., Mangis, D., Renfro, J.F., 1992. Effects of ambient ozone concentrations on mature eastern hardwood trees growing in Great Smoky Mountains National Park and Shenandoah National Park. Presented at 85th Annual Meeting of the Air and Waste Management Association, June 21–26, 1992.
3. Evaluation of ozone injury on foliage of black cherry (Prunus serotina) and tall milkweed (Asclepias exaltata) in Great Smoky Mountains National Park;Chappelka;Environmental Pollution,1997
4. Ambient ozone effects on forest trees of the eastern United States: a review;Chappelka;New Phytologist,1998
5. Reductions in gas exchange of Populus tremuloides caused by leaf aging and ozone exposures;Clark;Canadian Journal of Forest Research,1996