State of Ohio, Department of Highways, Division of Geological Survey, Topographic Maps of Ohio Quadrangles: Ashland, Bloomfield, Butler, Cambridge, Dellray, Jewett, Kimbolton, Lucas, Olivesburg, Ostego, Pavonia, Plainfield, Quaker City, Shiloh, Strasburg, Sugarcreek, Summerfield, Waynesburg, Wilma, 1960–1994

State of Ohio, Department of Highways, Division of Geological Survey, Topographic Maps of Ohio Quadrangles: Ashland, Bloomfield, Butler, Cambridge, Dellray, Jewett, Kimbolton, Lucas, Olivesburg, Ostego, Pavonia, Plainfield, Quaker City, Shiloh, Strasburg, Sugarcreek, Summerfield, Waynesburg, Wilma, 1960–1994, Box: 96, Item: 204. Institute for the History of Technology and Industrial Archaeology Records, A&M 3936. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/155928 Accessed November 22, 2024.