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Photographs of the Catskill water supply system in process of construction
General Research Division, The New York Public Library. "Moodna supplementary tunnel. .. Contract 160. April 28, 1915." The New York Public Library Digital Collections. 1918. https://digitalcollections.nypl.org/items/510d47da-de28-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "Moodna supplementary tunnel. .. Contract 160. April 28, 1915." New York Public Library Digital Collections. Accessed January 30, 2025. https://digitalcollections.nypl.org/items/510d47da-de28-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1918). Moodna supplementary tunnel. .. Contract 160. April 28, 1915. Retrieved from https://digitalcollections.nypl.org/items/510d47da-de28-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47da-de28-a3d9-e040-e00a18064a99 | title=
(still image)
Moodna supplementary tunnel. .. Contract 160. April 28, 1915., (1918)|author=Digital Collections, The New York Public Library |accessdate=January 30, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>