Clerke, W. H., R. F. Bassett, and J. L. Knighten. Evaluation of Southern Pine Beetle Infestation in the Great Smoky Mountains National Park, Tennessee. U.S. Department of Agriculture, Forest Service, 1968.

Clerke, W. H., R. F. Bassett, and J. L. Knighten. Evaluation of Southern Pine Beetle Infestation on the Great Smoky Mountains National Park. U.S. Department of Agriculture, Forest Service, 1968.