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Photographs of the Catskill water supply system in process of construction
General Research Division, The New York Public Library. "Pleasantville Venturi meter. ... Contract 55. August 22, 1911." The New York Public Library Digital Collections. 1918. https://qa-digitalcollections.nypl.org/items/510d47da-de0f-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. "Pleasantville Venturi meter. ... Contract 55. August 22, 1911." New York Public Library Digital Collections. Accessed December 12, 2024. https://qa-digitalcollections.nypl.org/items/510d47da-de0f-a3d9-e040-e00a18064a99
General Research Division, The New York Public Library. (1918). Pleasantville Venturi meter. ... Contract 55. August 22, 1911. Retrieved from https://qa-digitalcollections.nypl.org/items/510d47da-de0f-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/510d47da-de0f-a3d9-e040-e00a18064a99 | title=
(still image)
Pleasantville Venturi meter. ... Contract 55. August 22, 1911., (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>