McGregor, M. D., M. M. Furniss, W. E. Bousfield, and D. P. Almas. 1974. Evaluation of the Douglas-fir beetle infestation, North Fork Clearwater River Drainage, northern Idaho 1970-1973. United States Department of Agriculture, Forest Service, North Region, Insect and Disease Report 74-7. 17 p.
McGregor et al. 1974
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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