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Manuscripts and Archives Division, The New York Public Library. "Continuous movement by weight" The New York Public Library Digital Collections. 1908. https://old-digitalcollections.nypl.org/items/baa3d8d0-f2cf-013d-e879-0242ac110002
Manuscripts and Archives Division, The New York Public Library. "Continuous movement by weight" New York Public Library Digital Collections. Accessed September 18, 2026. https://old-digitalcollections.nypl.org/items/baa3d8d0-f2cf-013d-e879-0242ac110002
Manuscripts and Archives Division, The New York Public Library. (1908). Continuous movement by weight Retrieved from https://old-digitalcollections.nypl.org/items/baa3d8d0-f2cf-013d-e879-0242ac110002
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