Washburn, R. I., and J. A. E. Knopf. 1959. Mountain pine beetle conditions in the lodgepole pine stands of Forest Service Region 4. United States Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, Ogden, Utah.
Washburn & Knopf 1959
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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