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General Research Division, The New York Public Library. "Projet de ballon dirigeable de Mathieu (1784)." The New York Public Library Digital Collections. 1784. https://digitalcollections.nypl.org/items/627ecf0c-e8a6-1b87-e040-e00a18062931
General Research Division, The New York Public Library. "Projet de ballon dirigeable de Mathieu (1784)." New York Public Library Digital Collections. Accessed March 19, 2024. https://digitalcollections.nypl.org/items/627ecf0c-e8a6-1b87-e040-e00a18062931
General Research Division, The New York Public Library. (1784). Projet de ballon dirigeable de Mathieu (1784). Retrieved from https://digitalcollections.nypl.org/items/627ecf0c-e8a6-1b87-e040-e00a18062931
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