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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Washington, Yakima County, Roza Irrigation Canal. Sides concrete, lined by machine. The project, when complete in 1945, will open 72,000 acres to cultivation in East Yakima and West Benton Counties" The New York Public Library Digital Collections. 1939. https://old-digitalcollections.nypl.org/items/9a7f90a0-9767-0136-6387-0c38bca42d3b
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Washington, Yakima County, Roza Irrigation Canal. Sides concrete, lined by machine. The project, when complete in 1945, will open 72,000 acres to cultivation in East Yakima and West Benton Counties" New York Public Library Digital Collections. Accessed October 7, 2026. https://old-digitalcollections.nypl.org/items/9a7f90a0-9767-0136-6387-0c38bca42d3b
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1939). Washington, Yakima County, Roza Irrigation Canal. Sides concrete, lined by machine. The project, when complete in 1945, will open 72,000 acres to cultivation in East Yakima and West Benton Counties Retrieved from https://old-digitalcollections.nypl.org/items/9a7f90a0-9767-0136-6387-0c38bca42d3b
<ref name=NYPL>{{cite web | url=https://old-digitalcollections.nypl.org/items/9a7f90a0-9767-0136-6387-0c38bca42d3b | title=
(still image)
Washington, Yakima County, Roza Irrigation Canal. Sides concrete, lined by machine. The project, when complete in 1945, will open 72,000 acres to cultivation in East Yakima and West Benton Counties, (1939)|author=Digital Collections, The New York Public Library |accessdate=October 7, 2026 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>