Panama Canal Company, Engineering and Construction Bureau, Engineering Division, Balboa Heights, Panama, Canal Zone, Plans and Layouts for Balboa Bridge, Balboa, Panama, Canal Zone, Blueprints, 1959 September 1

Panama Canal Company, Engineering and Construction Bureau, Engineering Division, Balboa Heights, Panama, Canal Zone, Plans and Layouts for Balboa Bridge, Balboa, Panama, Canal Zone, Blueprints, 1959 September 1, Box: 113, Item: 295. 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/156019 Accessed November 23, 2024.