Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Laut, J. G., L. B. Hellburg, D. A. Leatherman, M. E. Schomaker, and K. Nishijima. 1978. Colorado forest insect and disease conditions, 1977. Colorado State Forest Service, Insect and Disease Division, Colorado State University, Fort Collins. 74 p.