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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "A natural protective watershed has been destroyed by unscrupulous logging companies. Mount Hood National Forest, Oregon" The New York Public Library Digital Collections. 1936. https://old-digitalcollections.nypl.org/items/30cc45a0-2026-0138-a0b4-45991c504aeb
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "A natural protective watershed has been destroyed by unscrupulous logging companies. Mount Hood National Forest, Oregon" New York Public Library Digital Collections. Accessed November 5, 2026. https://old-digitalcollections.nypl.org/items/30cc45a0-2026-0138-a0b4-45991c504aeb
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1936). A natural protective watershed has been destroyed by unscrupulous logging companies. Mount Hood National Forest, Oregon Retrieved from https://old-digitalcollections.nypl.org/items/30cc45a0-2026-0138-a0b4-45991c504aeb
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(still image)
A natural protective watershed has been destroyed by unscrupulous logging companies. Mount Hood National Forest, Oregon, (1936)|author=Digital Collections, The New York Public Library |accessdate=November 5, 2026 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>