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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Cranking up motor which will supply power for the miners drilling contest, Labor Day celebration, Silverton, Colorado" The New York Public Library Digital Collections. 1940. https://digitalcollections.nypl.org/items/d21ed990-f587-0136-cd35-292a45987fd5
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Cranking up motor which will supply power for the miners drilling contest, Labor Day celebration, Silverton, Colorado" New York Public Library Digital Collections. Accessed February 7, 2025. https://digitalcollections.nypl.org/items/d21ed990-f587-0136-cd35-292a45987fd5
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1940). Cranking up motor which will supply power for the miners drilling contest, Labor Day celebration, Silverton, Colorado Retrieved from https://digitalcollections.nypl.org/items/d21ed990-f587-0136-cd35-292a45987fd5
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/d21ed990-f587-0136-cd35-292a45987fd5 | title=
(still image)
Cranking up motor which will supply power for the miners drilling contest, Labor Day celebration, Silverton, 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>