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1992
Chappelka, Arthur H., Elisabeth Hildebrand, John M. Skelly, Deborah Mangis, and James R. Renfro. Effects of the Ambient Ozone Concentrations on Mature Eastern Hardwood Trees Growing in Great Smoky Mountains In 85th Annual Meeting and Exhibition, Air and Waste Management Association. Kansas City, Missouri, 1992.
Hacker, David W., and James R. Renfro. "Great Smoky Mountains Plants Studies for Ozone Sensitivity." Park Science: A Resource Management Bulletin 12, no. 1 (1992): 6-7.
Chappelka, Arthur H., and James R. Renfro. 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.
Hacker, David W., James R. Renfro, and Howard S. Neufeld. Sensitivity of Native Plant Species to Elevated Levels of Ozone In Third Annual Southern Appalachian Man and the Biosphere Conference. Gatlinburg, TN: Tennessee Valley Authority, 1992.
1990
Hacker, David W., and James R. Renfro. Ozone Response of Selected Plant Species from the Great Smoky Mountains National Park In First Annual Southern Appalachian Man and the Biosphere Conference. Gatlinburg, TN: Tennessee Valley Authority, 1990.
1989
Renfro, James R., and Becki Van Cleave. An Evaluation of the Backcountry Camping Permit System for 1983 and 1986 at Great Smoky Mountains National Park. Gatlinburg, TN: Uplands Field Research Laboratory, Great Smoky Mountains National Park, 1989.
1988
Peine, John Douglas, and James R. Renfro. Visitor Use Patterns at Great Smoky Mountains National Park In Research/Resources Management Report. Gatlinburg, TN: Uplands Field Research Laboratory, 1988.