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General correspondence relating to Civil Works projects originating under the Wilmington and Philadelphia Engineers, 1907-1943 (bulk) 1871-1948 (inclusive)

Held at: National Archives at Philadelphia [Contact Us]

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Negatives and Photographs of Fritz Engineering Laboratory Tests and Events, 1900-1961 (inclusive)

Held at: Lehigh University Special Collections [Contact Us]

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Collection of Bridge Postcards, 1910-1970

Held at: Lehigh University Special Collections [Contact Us]

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Delaware River Port Authority records on the naming of the Walt Whitman Bridge, 1954-1965 (inclusive)

Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]

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William H. Green glass plate negatives, circa 1908-1910, 1990-1991

Held at: Philadelphia History Museum [Contact Us]