Orr, P. W., L. F. Pettinger, and R. E. Dolph. 1965. Forest insect conditions in the Pacific Northwest during 1964. United States Department of Agriculture, Forest Service, Pacific Northwest Region, Portland, Oregon. 90 p.
Orr et al. 1965
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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