Computer-Assisted Management of the USDA Small Grain Collection. Wayne M. Porter, Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD. David H. Smith, Jr., Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD. Plant Dis. 66:435. 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, 1982. DOI: 10.1094/PD-66-435.