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U.S. Forest Service
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United States Department of Agriculture


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https://www.fs.usda.gov/treesearch/content/pdf?name=Responses%20of%20Ips%20pini%20(Say),%20Pityogenes%20knechteli%20Swaine%20and%20Associated%20Beetles%20(Coleoptera)%20to%20Host%20Monoterpenes%20in%20Stands%20of%20Lodgepole%20Pine