McGregor, M. D. 1972. Effect of thinning secondgrowth ponderosa pine on incidence of mountain pine beetle infestation—Establishment Report. United States Department of Agriculture, Forest Service, Northern Region, Report 1-72-6. 5 p.
McGregor 1972
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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