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Letter to the Editor

On Comparing Values of Vanderplank’s r. W. C. Fulton, Assistant professor, Department of Botany and Plant Pathology, Michigan State University, East Lansing, MI 48824; Phytopathology 69:1162. Accepted for publication 29 August 1979. Copyright 1979 The American Phytopathological Society. DOI: 10.1094/Phyto-69-1162.