Ciesla, W. M., M. D. McGregor, and S. Tunnock. 1972. Forest insect conditions, 1971, Northern Region. United States Department of Agriculture, Forest Service, Northern Region, State and Private Forestry, Report 72-3. 19 p.
Ciesla et al. 1972
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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