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United States Department of Agriculture


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https://www.fs.usda.gov/treesearch/content/pdf?name=Ergosterol%20content%20of%20fungi%20associated%20with%20Dendroctonus%20ponderosae%20and%20Dendroctonus%20rufipennis%20(Coleoptera:%20Curculionidae,%20Scolytinae)