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Photographs concerning labor, housing and social conditions in the United States
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Hamilton Watch Co. Operator is weighing the tiny balance screws that correct the gain or loss of time" The New York Public Library Digital Collections. 1900 - 1937. https://qa-digitalcollections.nypl.org/items/510d47d9-a9b5-a3d9-e040-e00a18064a99
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Hamilton Watch Co. Operator is weighing the tiny balance screws that correct the gain or loss of time" New York Public Library Digital Collections. Accessed November 22, 2024. https://qa-digitalcollections.nypl.org/items/510d47d9-a9b5-a3d9-e040-e00a18064a99
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1900 - 1937). Hamilton Watch Co. Operator is weighing the tiny balance screws that correct the gain or loss of time Retrieved from https://qa-digitalcollections.nypl.org/items/510d47d9-a9b5-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/510d47d9-a9b5-a3d9-e040-e00a18064a99 | title=
(still image)
Hamilton Watch Co. Operator is weighing the tiny balance screws that correct the gain or loss of time, (1900 - 1937)|author=Digital Collections, The New York Public Library |accessdate=November 22, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>