Query: Iron and steel bridges
Archives Center, National Museum of American History

Finding aid

Archives Center, National Museum of American History

Finding aid

Archives Center, National Museum of American History

Finding aid

Archives Center, National Museum of American History

Finding aid

Archives Center, National Museum of American History

Pacific Coast Borax Company, San Francisco, California

Archives Center, National Museum of American History

Berlin Construction Company, Berlin, Connecticut

Archives Center, National Museum of American History

Frank Masters

Archives of American Gardens

Philadelphia -- Upper Bank

Archives Center, National Museum of American History

Roebling Scrapbook, 1975 October

Archives Center, National Museum of American History

U.S. Steel Corporation Photograph Albums

Archives Center, National Museum of American History

"Iron workers' lunch hour"

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