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In vitro Production of Basidiospores of Polyporus tomentosus. Donald T. Myren, Former Graduate Research Assistant, now Research Scientist, Canadian Forestry Service, Forest Research Laboratory, Sault Ste. Marie, Ontario; Robert F. Patton, Professor, Department of Plant Pathology, University of Wisconsin, Madison 53706. Phytopathology 60:911. DOI: 10.1094/Phyto-60-911.