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© The New York Public Library, 2026
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Photographs of the construction of the Holland Tunnel, 1919-1927
General Research Division, The New York Public Library. "General view, West side, tube opening. Showing riveters at work, lines of air hose. Spring Street, May 6, 1921." The New York Public Library Digital Collections. 1921. https://old-digitalcollections.nypl.org/items/510d47da-dc2d-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "General view, West side, tube opening. Showing riveters at work, lines of air hose. Spring Street, May 6, 1921." New York Public Library Digital Collections. Accessed October 3, 2026. https://old-digitalcollections.nypl.org/items/510d47da-dc2d-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1921). General view, West side, tube opening. Showing riveters at work, lines of air hose. Spring Street, May 6, 1921. Retrieved from https://old-digitalcollections.nypl.org/items/510d47da-dc2d-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://old-digitalcollections.nypl.org/items/510d47da-dc2d-a3d9-e040-e00a18064a99 | title=
(still image)
General view, West side, tube opening. Showing riveters at work, lines of air hose. Spring Street, May 6, 1921., (1921)|author=Digital Collections, The New York Public Library |accessdate=October 3, 2026 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>