Barry, Patrick J., James D. Ward, and W. E. McDowell. Evaluation of Southern Pine Beetle Infestations on the Cheoah Ranger District, Nantahala National Forest, NC and Great Smoky Mountains National Park, NC and TN. U.S. Department of Agriculture , 1971.

Barry, Patrick J., and Emmett T. Wilson. Evaluation of Southern Pine Beetle Infestations on the Cheoah Ranger District, Nantahala National Forest, NC and Great Smoky Mountains National Park, North Carolina. U.S. Department of Agriculture, Forest Service, 1971.