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© The New York Public Library, 2024
The New York Public Library is a 501(c)(3) | EIN 13-1887440
1916-18; Rotary press coil stamps; Perforated 10 horizontally.
Manuscripts and Archives Division, The New York Public Library. "3c violet Washington strip of four" The New York Public Library Digital Collections. 1916 - 1918. https://digitalcollections.nypl.org/items/5e66b3e8-7868-d471-e040-e00a180654d7
Manuscripts and Archives Division, The New York Public Library. "3c violet Washington strip of four" New York Public Library Digital Collections. Accessed April 26, 2024. https://digitalcollections.nypl.org/items/5e66b3e8-7868-d471-e040-e00a180654d7
Manuscripts and Archives Division, The New York Public Library. (1916 - 1918). 3c violet Washington strip of four Retrieved from https://digitalcollections.nypl.org/items/5e66b3e8-7868-d471-e040-e00a180654d7
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/5e66b3e8-7868-d471-e040-e00a180654d7 | title=
(still image)
3c violet Washington strip of four, (1916 - 1918)
|author=Digital Collections, The New York Public Library |accessdate=April 26, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>