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Landscape-Scale Prediction of Hemlock Woolly Adelgid, Adelges tsugae (Homoptera: Adelgidae), Infestation in the Southern Appalachian Mountains." Environmental Entomology 35, no. 5 (2006): 1313-1323.
"A Simulation Study of the Cades Cove Visitor Vehicle Flow. Washington, D.C.: U.S. Department of the Interior, National Park Service, 1976.
Back-country Data Collection System for the Great Smoky Mountains National Park In Progress Report. The Pennsylvania State University Cooperative Park Studies Unit, 1975.