NPS (National Parks Service) Bridge Recording Project in National Parks -- Photo Mechanical Transfers -- Rock Creek and Potomac Parkway -- Washington, D.C.

NPS (National Parks Service) Bridge Recording Project in National Parks -- Photo Mechanical Transfers -- Rock Creek and Potomac Parkway -- Washington, D.C., Box: 66, Folder: 1. 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/127608 Accessed November 22, 2024.