United States Department of the Interior, Geological Survey, National Mapping Program, Pamphlet: "Index to Small-Scale Maps of the United States", 1989 April 1

United States Department of the Interior, Geological Survey, National Mapping Program, Pamphlet: "Index to Small-Scale Maps of the United States", 1989 April 1, Box: 140, Item: 383. 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/156107 Accessed July 03, 2024.