. Differential effects of the 1944-56 spruce budworm outbreak in eastern Oregon. Spruce budworm Oregon; Trees Diseases and pests Oregon. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Williams, Carroll B. cn; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). [Portland, Or. ] : Pacific Northwest Forest and Range Experiment Station, Forest Service, U. S. Dept. of Agriculture

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity