Archives Center, National Museum of American History
Archives Center, National Museum of American History
Archives Center, National Museum of American History
Archives Center, National Museum of American History
Archives Center, National Museum of American History
Pennsylvania Railroad Tunnels and Terminals in New York City
Ralph Rinzler Folklife Archives and Collections
Archives Center, National Museum of American History
Cummings Structural Concrete Company Records: 1884-1952 and undated