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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "2-page letter from Cros to Fizeau discussing the 3-color photomechanical process" The New York Public Library Digital Collections. 1848. https://digitalcollections.nypl.org/items/f2a9c4a0-1e63-0137-2467-0f33820d24e6
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "2-page letter from Cros to Fizeau discussing the 3-color photomechanical process" New York Public Library Digital Collections. Accessed January 30, 2025. https://digitalcollections.nypl.org/items/f2a9c4a0-1e63-0137-2467-0f33820d24e6
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1848). 2-page letter from Cros to Fizeau discussing the 3-color photomechanical process Retrieved from https://digitalcollections.nypl.org/items/f2a9c4a0-1e63-0137-2467-0f33820d24e6
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