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The New York Public Library is a 501(c)(3) | EIN 13-1887440
John A. Roebling Sons Company Brooklyn Bridge engineer's drawings
Manuscripts and Archives Division, The New York Public Library. "Elevation of part of track" The New York Public Library Digital Collections. 1870. https://digitalcollections.nypl.org/items/9aa9fb10-3889-013c-2e1f-0242ac110003
Manuscripts and Archives Division, The New York Public Library. "Elevation of part of track" New York Public Library Digital Collections. Accessed January 28, 2025. https://digitalcollections.nypl.org/items/9aa9fb10-3889-013c-2e1f-0242ac110003
Manuscripts and Archives Division, The New York Public Library. (1870). Elevation of part of track Retrieved from https://digitalcollections.nypl.org/items/9aa9fb10-3889-013c-2e1f-0242ac110003
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/9aa9fb10-3889-013c-2e1f-0242ac110003 | title=
(still image)
Elevation of part of track, (1870)|author=Digital Collections, The New York Public Library |accessdate=January 28, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>