Orr, P. W., and L. F. Pettinger. 1964. Forest insect conditions in the Pacific Northwest during 1963. United States Department of Agriculture, Forest Service, Insect and Disease Control Branch, Division of Timber Management, Pacific Northwest Region, Portland, Oregon. 60 p.
Orr & Pettinger 1964
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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