Wilson, E. T., W. H. Clerke, and J. G. D. Ward. 1974. Evaluation of southern pine beetle infestations on the Tyger, Enoree, Long Cane, and Andrew Pickens Ranger Districts, Sumter National Forest, South Carolina. United States Department of Agriculture, Forest Service, Southern Region, State and Private Forestry, Forest Pest Management, Report 74-1-6.