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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Workman weighing sample of gold ore and cyanide solution to determine if proper concentration of liquid is being maintained. Mogollon, New Mexico" The New York Public Library Digital Collections. 1940. https://old-digitalcollections.nypl.org/items/5096e1f0-5fad-0137-bf30-05ca2ee772d4
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Workman weighing sample of gold ore and cyanide solution to determine if proper concentration of liquid is being maintained. Mogollon, New Mexico" New York Public Library Digital Collections. Accessed October 7, 2026. https://old-digitalcollections.nypl.org/items/5096e1f0-5fad-0137-bf30-05ca2ee772d4
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1940). Workman weighing sample of gold ore and cyanide solution to determine if proper concentration of liquid is being maintained. Mogollon, New Mexico Retrieved from https://old-digitalcollections.nypl.org/items/5096e1f0-5fad-0137-bf30-05ca2ee772d4
<ref name=NYPL>{{cite web | url=https://old-digitalcollections.nypl.org/items/5096e1f0-5fad-0137-bf30-05ca2ee772d4 | title=
(still image)
Workman weighing sample of gold ore and cyanide solution to determine if proper concentration of liquid is being maintained. Mogollon, New Mexico, (1940)|author=Digital Collections, The New York Public Library |accessdate=October 7, 2026 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>