McGregor, M. D., and M. J. Berg. 1973. Evaluation of mountain pine beetle infestations: Yellowstone National Park, Wyoming, 1972. United States Department of Agriculture, Forest Service, Northern Region, Report 73-4. 5 p.
McGregor & Berg 1973
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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