Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Ragenovich, I. R. 1980b. Southwestern Region (R-3). Pages 20-24 in P. W. Orr and H. D. Rrown, Forest insect and disease conditions in the United States, 1978. United States Department of Agriculture, Forest Service. iv + 83 p.