O.B. Copeland. "What is This Electric-Age Agriculture?" presented before the Southeastern Electric Exchange Sales Conference at the Sheraton-Park Hotel in Washington, D.C., November 9-10, 1966

O.B. Copeland. "What is This Electric-Age Agriculture?" presented before the Southeastern Electric Exchange Sales Conference at the Sheraton-Park Hotel in Washington, D.C., November 9-10, 1966, MS0256-011296, Box: 22, Folder: 3. USDA Division of Agricultural Engineering Records, MS0256. National Agricultural Library Special Collections. http://localhost:8081/repositories/4/archival_objects/81251 Accessed February 19, 2026.