Klein, W. H., D. L. Parker, L. E. Stipe, and A. C. Tegethoff. 1973. Intermountain States (R-4). Pages 23-28 in D. P. Graham and J. F. Chansler, Forest insect and disease conditions in the United States, 1972. United States Department of Agriculture, Forest Service. vi + 72 p.
Klein et al. 1973
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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