The American Phytopathological Society (APS) is a non-profit, professional, scientific organization dedicated to the study and control of plant diseases.
Joseph Michael Daly, 1922-1993. M. K. Brakke and M. G. Boosalis. Phytopathology 84:552.
Copyright 1994 The American Phytopathological Society. doi:10.1094/Phyto-84-552.