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© The New York Public Library, 2024
The New York Public Library is a 501(c)(3) | EIN 13-1887440
July 15, 1918 ; First flights 16 cent airmail rate between Washington and New York.
Manuscripts and Archives Division, The New York Public Library. "1918 Washington, D. C. to New York, New York first 16c rate flight cover" The New York Public Library Digital Collections. 1918. https://digitalcollections.nypl.org/items/510d47e3-c57c-a3d9-e040-e00a18064a99
Manuscripts and Archives Division, The New York Public Library. "1918 Washington, D. C. to New York, New York first 16c rate flight cover" New York Public Library Digital Collections. Accessed April 30, 2024. https://digitalcollections.nypl.org/items/510d47e3-c57c-a3d9-e040-e00a18064a99
Manuscripts and Archives Division, The New York Public Library. (1918). 1918 Washington, D. C. to New York, New York first 16c rate flight cover Retrieved from https://digitalcollections.nypl.org/items/510d47e3-c57c-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47e3-c57c-a3d9-e040-e00a18064a99 | title=
(still image)
1918 Washington, D. C. to New York, New York first 16c rate flight cover, (1918)
|author=Digital Collections, The New York Public Library |accessdate=April 30, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>