Eggleton, Michael A., Eric L. Morgan, and Wendell L. Pennington. Laurel Branch Acid Precipitation Mitigation Program:  An Overview In First Annual Southern Appalachian Man and the Biosphere Conference. Gatlinburg, TN: Tennessee Valley Authority, 1990.

Mathews, Raymond C., and Eric L. Morgan. "Toxicity of Anakeesta Formation Leachates to Shovel-Nosed Salamander, Great Smoky Mountains National Park." Journal of Environmental                        Quality 11, no. 1 (1982): 102-106.

Robinette, J. R., and Eric L. Morgan. "Abstracts Presented at the Annual Meeting: Length-Weight Relationship in Brook Trout/ Salvelinus Fontinalis/ [Mitchill] of the Great Smoky Mountains National Park." Journal of the Tennessee Academy of Science 53, no. 2 (1978): 74.

Mathews, Raymond C., J. D. Sinks, and Eric L. Morgan. Acid Drainage Toxicity and Assessment of Sodium Hydroxide Neutralization in Streams of the Great Smoky Mountains In 1st. Conference on Science Research in National Parks. Vol. 1. New Orleans, LA: U.S. Department of the Interior, National Park Service, 1976.

Herrmann, Ray, Eric L. Morgan, and R. L. Green. Aluminum Precipation, Beech Flats and Walker's Prong Creeks, Great Smoky Mountains National Park In 1st Conference on Scientific Research in the National Parks, Edited by Robert M. Linn. Vol. II. New Orleans: U.S. Department of the Interior, National Park Service, 1976.

Trumpf, William F., Eric L. Morgan, and Ray Herrmann. Man Induced Acid Drainage Impact on Benthic Macroinvertebrate Communites in the Great Smoky Mountains National Park In 1st Conference on Scientific Reserach in the National Parks, Edited by Robert M. Linn. Vol. I. New Orleans: U.S. Department of the Interior, National Park Service, 1976.

Mathews, Raymond C., Margaret Davis, Eric L. Morgan, and Theresa J. Mathews. "Salamander (Pleurognathus marmoratus / Moore) of the Great Smoky Mountains National Park." Journal of the Tennessee Academy of Science 50, no. 2 (1975): 59.