Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Cahill, D. B., and C. K. Lister. 1971. Central Rocky Mountains (R-2). Pages 21-23 in A. E. Landgraf, Forest insect conditions in the United States, 1970. United States Department of Agriculture, Forest Service. vi + 44 p.
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