Clerke, W. H., and R. F. Bassett. An Evaluation of Southern Pine Beetle Infestation, Great Smoky Mountains National Park, in Tennessee and North Carolina. U.S. Department of Agriculture, Forest Service, 1969.

Clerke, W. H., R. F. Bassett, and H. L. Lambert. Detection and Evaluation of Southern Pine Beetle Infestations on the Great Smoky Mountains National Park. Asheville, NC: U.S. Forest Service, 1968.

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.