United States Department of the Interior, National Park Service, Branch of Plans and Design, Eastern Division, Preliminary Plan for Thornton Gap Headquarters Area, Shenandoah National Park, Blueprint, October-November 1935

United States Department of the Interior, National Park Service, Branch of Plans and Design, Eastern Division, Preliminary Plan for Thornton Gap Headquarters Area, Shenandoah National Park, Blueprint, October-November 1935, Box: 107, Item: 286. 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/156010 Accessed November 23, 2024.