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© The New York Public Library, 2024
The New York Public Library is a 501(c)(3) | EIN 13-1887440
October 6, 1920; First aeroplane mail flight, Panama Canal to U.S.A.
Manuscripts and Archives Division, The New York Public Library. "1920 Panama Canal to U. S. A. flight cover" The New York Public Library Digital Collections. 1920. https://digitalcollections.nypl.org/items/510d47e3-c54f-a3d9-e040-e00a18064a99
Manuscripts and Archives Division, The New York Public Library. "1920 Panama Canal to U. S. A. flight cover" New York Public Library Digital Collections. Accessed April 19, 2024. https://digitalcollections.nypl.org/items/510d47e3-c54f-a3d9-e040-e00a18064a99
Manuscripts and Archives Division, The New York Public Library. (1920). 1920 Panama Canal to U. S. A. flight cover Retrieved from https://digitalcollections.nypl.org/items/510d47e3-c54f-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47e3-c54f-a3d9-e040-e00a18064a99 | title=
(still image)
1920 Panama Canal to U. S. A. flight cover, (1920)
|author=Digital Collections, The New York Public Library |accessdate=April 19, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>