Lessard, E. D., and J. W. Walters. 1978. Southwestern Region (R-3). Pages 23-27 in P. W. Orr and H. D. Brown, Forest insect and disease conditions in the United States, 1977. United States Department of Agriculture, Forest Service. 88 p.
Lessard & Walters 1978
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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