. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. . 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 Merrill, William; Ostry, Michael E; United States. Forest Service; International Union of Forestry Research Organizations. Working Party on Foliage Diseases. Washington, D. C. : U. S. Dept. of Agriculture, Forest Se

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. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. . 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 Merrill, William; Ostry, Michael E; United States. Forest Service; International Union of Forestry Research Organizations. Working Party on Foliage Diseases. Washington, D. C. : U. S. Dept. of Agriculture, Forest Service

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