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Letter to the Editor

Estimating Parasitic Fitness: Epilogue. D. R. MacKenzie, Associate professor, Department of Plant Pathology, The Pennsylvania State University, University Park 16802; Phytopathology 70:842. Accepted for publication 2 July 80. Copyright The American Phytopathological Society. DOI: 10.1094/Phyto-70-842.