Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Downing, G. L., J. D. Ward, and W. M. Ciesla. 1970. Southern and southeastern states. Pages 25-32 in A. E. Landgraf, Forest insect and disease conditions in the United States, 1969. United States Department of Agriculture, Forest Service. vi + 40 p.