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Letter to the Editor

The Virulence Associations in Puccinia graminis f. sp. tritici in North America. A. P. Roelfs, United States Dept. of Agriculture, Cereal Rust Laboratory, University of Minnesota, St. Paul 55108; J. W. Martens, Agriculture Canada, Research Station, Winnipeg, Manitoba R3T 2M9. Phytopathology 74:1022. Accepted for publication 21 May 1984. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1984. DOI: 10.1094/Phyto-74-1022.