Sartwell, F. 1970. Ips pini attack density in ponderosa pine thinning slash as related to felling date in eastern Oregon. United States Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, Research Note PNW-131. 8 p.
Sartwell 1970
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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