Werner, R., and E. Holsten. 1997. Dispersal of the spruce beetle, Dendroctonus rufipennis, and the engraver beetle, Ips perturbatus, in Alaska. United States Department of Agriculture, Forest Service, Pacific Northwest Research Station (Portland, OR), Research Paper PNW-RP-501. 8 pp.
Werner & Holsten 1997
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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