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Ecology and Decline of Red Spruce in the Eastern United States In Ecological Studies: Analysis and Synthesis. Vol. 96. New York, NY: Springer-Verlag, 1992.
Assessment of Forest Decline in the Southern Appalachian Spruce-Fir Forest, USA." In Air Pollution and Forest Decline: Proceedings of the 14th International Meeting for Specialists in Air Pollution Effects on Forest Ecosystems, International Union of Forest Research O, 239-44. Birmensdorf, Switzerland: Eidgenössische Anstalt für das forstliche Versuchswesen, 1989.
"Review of the Biology and Ecology of the Balsam Woolly Aphid in Southern Appalachian Spruce-Fir Forests." In The Southern Appalachian Spruce-Fir Ecosystem: Its Biology and Threats, 36-50. Research/Resources Management Report. Gatlinburg, TN: Uplands Field Research Laboratory , 1984.
"Monitoring and Reserch Related to Atmospheric Deposition in Great Smoky Mountains National Park In National Acid Precipitation Assessment Program: Aquatic Effects Task Group and Terrestrial Effects Task Group Peer Review. Asheville, NC: U.S. Department of Agriculture , 1984.
Stand Characteristics Associated with Potential Decline of Spruce-Fir Forests in the Southern Appalachians In Proceedings of the US/FRG Research Symposium: Effects of Atmospheric Pollutants on the Spruce-Fir Forests of the Eastern United States and the Federal Republic of Germany. Burlington, VT: U.S.D.A. Forest Service, 1988.
The Wild Hog Research Program in Great Smoky Mountains National Park In Conference on Science in the National Parks. WR 208 ed. Vol. 4. George Wright Society, 1986.
A Comparison of Overstory Community Structure in Three Southern Appalachian Spruce-Fir Forests." Bulletin of the Torrey Botanical Club 119, no. 3 (1992): 316-332.
"Seedling Recruitment and Stand Regeneration in Spruce-Fir Forests of the Great Smoky Mountains." Bulletin of the Torrey Botanical Club 119, no. 3 (1992): 289-299.
"Two Decades of Change in a Great Smoky Mountains Spruce-Fir Forest." Bulletin of the Torrey Botanical Club 115, no. 1 (1988): 25-31.
"Critique of a Newspaper Article Dealing With Forest Condition In Great Smoky Mountains National Park. Great Smoky Mountains National Park, Science Division, 1987.
Final Contract Report for Regional Chief Scientist, Southeast Regional Office, National Park Service On Stem Morphology and Physiology of Fraser Fir in Relation to Balsam Wolly Aphid. Knoxville, TN: University of Tennessee, 1981.
Forest Damage on Clingman's Dome Great Smoky Mountains National Park and Summary of Current Research. Great Smoky Mountains National Park, Science Division, 1987.
Fraser Fir in the Great Smoky Mountains National Park: Its Demise by the Balsam Woolly Aphid (Adelges Piceae Ratz.). Knoxville, TN: Department of Forestry, University of Tennessee, 1978.
Southern Appalachian Red Spruce--Fraser Fir Forests In Analyses of Great Smoky Mountain Red Spruce Tree Ring Data. New Orleans, LA: U.S. Department of Agriculture, Forest Service,, 1988.
Status of the Balsam Woolly Aphid in the Great Smoky Mountains National Park --- 1976 In Management Report. Gatlinburg, TN: Uplands Field Research Laboratory, 1976.
Distribution and Characteristics of Balsam Woolly Aphid Infestation in the Great Smoky Mountains In Forestry. Knoxville, TN: University of Tennessee, 1978.
Investigations of Balsam Woolly Aphid-Fraser Fir Interaction: Feeding Site Characteristics and Wound Response. Knoxville, TN: The University of Tennessee, 1985.