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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Loading gold ore concentrate into freight cars of narrow gauge railroad, Ouray, Colorado" The New York Public Library Digital Collections. 1940. https://digitalcollections.nypl.org/items/9618a390-f293-0136-8b73-678b6da2d7fb
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Loading gold ore concentrate into freight cars of narrow gauge railroad, Ouray, Colorado" New York Public Library Digital Collections. Accessed February 7, 2025. https://digitalcollections.nypl.org/items/9618a390-f293-0136-8b73-678b6da2d7fb
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1940). Loading gold ore concentrate into freight cars of narrow gauge railroad, Ouray, Colorado Retrieved from https://digitalcollections.nypl.org/items/9618a390-f293-0136-8b73-678b6da2d7fb
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(still image)
Loading gold ore concentrate into freight cars of narrow gauge railroad, Ouray, Colorado, (1940)|author=Digital Collections, The New York Public Library |accessdate=February 7, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>