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Letter to the Editor

Multilines and “Super Races”: a Simple Model. J. V. Groth, Assistant Professor, Department of Plant Pathology, University of Minnesota, St. Paul 55108; Phytopathology 66:937. Copyright © 1976 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-66-937.