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By: Keen, F. P. (Frederick Paul), - United States. Bureau of Entomology.Edition:Publication info: [Washington?], U.S. Dept. of Agriculture, [1927]Volume: 1927Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Arizona Bark beetles California Control Dendroctonus brevicomis Dendroctonus jeffreyi Dendroctonus ponderosae Detection Disease Outbreaks forest pests Idaho Ips Melanophila Montana Oregon pest management South Dakota Surveys Washington (State) West (U.S.) West United StatesBHL Collections: