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Photographs of the construction of the Holland Tunnel, 1919-1927
General Research Division, The New York Public Library. "Contract No. 3. General view New York River shaft caisson in dry dock. Staten Island Shipbuilding Co.'s Plant. Mariner's Harbor, S.I. 12/20/23, 2:20 p.m." The New York Public Library Digital Collections. 1923. https://digitalcollections.nypl.org/items/510d47da-dc7c-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "Contract No. 3. General view New York River shaft caisson in dry dock. Staten Island Shipbuilding Co.'s Plant. Mariner's Harbor, S.I. 12/20/23, 2:20 p.m." New York Public Library Digital Collections. Accessed January 16, 2025. https://digitalcollections.nypl.org/items/510d47da-dc7c-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1923). Contract No. 3. General view New York River shaft caisson in dry dock. Staten Island Shipbuilding Co.'s Plant. Mariner's Harbor, S.I. 12/20/23, 2:20 p.m. Retrieved from https://digitalcollections.nypl.org/items/510d47da-dc7c-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47da-dc7c-a3d9-e040-e00a18064a99 | title=
(still image)
Contract No. 3. General view New York River shaft caisson in dry dock. Staten Island Shipbuilding Co.'s Plant. Mariner's Harbor, S.I. 12/20/23, 2:20 p.m., (1923)|author=Digital Collections, The New York Public Library |accessdate=January 16, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>