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Evolution and Measurement of Species Diversity." Taxon 21, no. 2/3 (1972): 213-251.
"Land Use Information Service. North Carolina Dept. of Administration, Office of State Planning, 1976.
Climate Data by Elevation in the Great Smoky Mountains: A Database and Graphical Displays for 1947 – 1950 with Comparison to Long-term Data. U. S. Department of the Interior, U. S. Geological Survey, 2005.
A Land Imperiled: The Declining Health of the Southern Appalachian Bioregion In Outdoor Tennessee. Knoxville, TN: The University of Tennessee Press, 2005.
Recruitment History, Current Health and Conservation Genetics of Butternut (Juglans cinerea) Populations in Great Smoky Mountains National Park. Department of Forestry and Natural Resources, Purdue University, 2011.