United States Department of the Interior, National Park Service, Historic American Engineering Record, IHTIA: (1) Nuttalburg Coal Mine Complex Recording Project [1873], Lookout Vicinity, Fayette County, West Virginia, Blueprints (2) Ethel Coal Company Mine Supply Building Recording Project (Warehouse) - ca. 1914, Ethel, Logan County, West Virginia, Blueprints, July 1991

United States Department of the Interior, National Park Service, Historic American Engineering Record, IHTIA: (1) Nuttalburg Coal Mine Complex Recording Project [1873], Lookout Vicinity, Fayette County, West Virginia, Blueprints (2) Ethel Coal Company Mine Supply Building Recording Project (Warehouse) - ca. 1914, Ethel, Logan County, West Virginia, Blueprints, July 1991, Box: 121, Item: 314. 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/156038 Accessed November 23, 2024.