The American Phytopathological Society (APS) is a non-profit, professional, scientific organization dedicated to the study and control of plant diseases.

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Obituary

John Charles Walker, 1893 to 1994. C. R. Grau, D. J. Hagedorn, and P. H. Williams. Phytopathology 85:636. Copyright 1995 by The American Phytopathological Society. doi:10.1094/Phyto-85-636.

 
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