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Photographs of the Catskill water supply system in process of construction
General Research Division, The New York Public Library. "Bridges. Ashokan reservoir. ... Contract 49. April 16, 1913." The New York Public Library Digital Collections. 1918. https://qa-digitalcollections.nypl.org/items/510d47da-ddf0-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "Bridges. Ashokan reservoir. ... Contract 49. April 16, 1913." New York Public Library Digital Collections. Accessed December 12, 2024. https://qa-digitalcollections.nypl.org/items/510d47da-ddf0-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1918). Bridges. Ashokan reservoir. ... Contract 49. April 16, 1913. Retrieved from https://qa-digitalcollections.nypl.org/items/510d47da-ddf0-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/510d47da-ddf0-a3d9-e040-e00a18064a99 | title=
(still image)
Bridges. Ashokan reservoir. ... Contract 49. April 16, 1913., (1918)|author=Digital Collections, The New York Public Library |accessdate=December 12, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>