Sartwell, C., R. F. Schmitz, and W. J. Buckhorn. 1971. Pine engraver, Ips pini, in the western states. United States Department of Agriculture, Forest Service, Forest Pest Leaflet 122. 5 p.
Buckhorn et al. 1971
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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