Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Acciavatti, R. E., and M. J. Weiss. 1975. Southwestern states (R-3). Pages 34-37 in Forest insect and disease conditions in the United States, 1973. United States Department of Agriculture, Forest Service, Albuquerque, New Mexico, Unnumbered report.