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 November 11

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 November 11, Box: 110, Item: 290. 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/156014 Accessed January 08, 2025.