Frye, R. H. 1975. Mountain pine beetle, Pike and San Isabel and Arapaho National Forests. United States Department of Agriculture, Forest Service, Rocky Mountain Region, State and Private Forestry, Biological Evaluation R2-75-1. 5 p.
Frye 1975
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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