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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Soil erosion at Arroyo Grande, California. Soil Conservation has one of its principal stations here" The New York Public Library Digital Collections. 1936. https://digitalcollections.nypl.org/items/2f2598c0-73d9-0136-c83c-01e3f49da668
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Soil erosion at Arroyo Grande, California. Soil Conservation has one of its principal stations here" New York Public Library Digital Collections. Accessed February 7, 2025. https://digitalcollections.nypl.org/items/2f2598c0-73d9-0136-c83c-01e3f49da668
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1936). Soil erosion at Arroyo Grande, California. Soil Conservation has one of its principal stations here Retrieved from https://digitalcollections.nypl.org/items/2f2598c0-73d9-0136-c83c-01e3f49da668
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(still image)
Soil erosion at Arroyo Grande, California. Soil Conservation has one of its principal stations here, (1936)|author=Digital Collections, The New York Public Library |accessdate=February 7, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>