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Wildflowers of the Smokies. Gatlingburg, TN: Great Smoky Mountains Natural History Association, 1996.
Wildflowers of the Smokies. 2nd ed. Great Smoky Mountains Association.
Natural Resource Management and Research in Great Smoky Mountains National Park In Second International Symposium on Advanced Technology in Natural Resources Management. Washington, DC, 1990.
Checklist of Odonata from Great Smoky Mountains National Park." Southeastern Naturalist 6, no. sp2 (2007): 207-214.
"Diversity of Scale Insects (Homoptera: Coccoidea) in the Great Smoky Mountains National Park." Annals of the Entomological Society of America 87, no. 2 (1994): 225-230.
"Dragonflies and Damselflies of the Smokies." Southeastern Biology 53, no. 2 (2006): 180.
"Land Snails of Selected Rare High Elevation Forests and Heath Balds of the Great Smoky Mountains National Park." Journal of North Carolina Academy of Science 128, no. 2 (2012): 27-32.
"Scientific Research and Collecting Permits in National Parks." ATBI Quarterly 2, no. 2 (2001): 8.
"Seslids, or Clear-Wing Moths." ATBI Quarterly 2, no. 3 (2001): 12.
"The Smokies All Taxa Biodiversity Inventory: History and Progress." Southeastern Naturalist 6, no. sp2 (2007): 27-34.
"Memorandum from Keith R. Langdon to the Superintendent on Ramps. Great Smoky Mountain National Park, 1995.
Recovery Plan for Rock Gnome Lichen: (Gymnoderma lineare) (Evans) Yoshimura and Sharp. Prepared for U.S. Fish and Wildlife Service, 1997.