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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Valves to irrigation gates. Main irrigation canal in Maricopa County, Arizona" The New York Public Library Digital Collections. 1940. https://digitalcollections.nypl.org/items/f1cde950-5262-0137-6e3f-4b6d72184d99
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Valves to irrigation gates. Main irrigation canal in Maricopa County, Arizona" New York Public Library Digital Collections. Accessed February 11, 2025. https://digitalcollections.nypl.org/items/f1cde950-5262-0137-6e3f-4b6d72184d99
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1940). Valves to irrigation gates. Main irrigation canal in Maricopa County, Arizona Retrieved from https://digitalcollections.nypl.org/items/f1cde950-5262-0137-6e3f-4b6d72184d99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/f1cde950-5262-0137-6e3f-4b6d72184d99 | title=
(still image)
Valves to irrigation gates. Main irrigation canal in Maricopa County, Arizona, (1940)|author=Digital Collections, The New York Public Library |accessdate=February 11, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>