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Charles Edwards Wood Panama Canal Photograph Album
Baltimore and Ohio Railroad Records
S. Morgan Smith Company Records
Washington, DC Bridges Collection
Woodward Governor Company Records
Lombard Governor Company Records
T.B. Cryer Company Records
Nagle Engine and Boiler Works Records
Elmer Treloar Collection of Railroad Station Negatives
Wheeling and Lake Erie Railway Photographs
Northern Pacific Railway Photoprints
Penn Station, New York, Photographs
Quebec Bridge Photograph Collection
Robert Lee Weide Photographs
United States Capitol Dome Drawings
Raymond E. Wilson Covered Bridge Collection