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By: Merrill, William. - Ostry, Michael E. - United States. Forest Service. - International Union of Forestry Research Organizations. Working Party on Foliage Diseases.Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, Forest Service, [1990]Volume: no.56Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections: