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© The New York Public Library, 2025
The New York Public Library is a 501(c)(3) | EIN 13-1887440
1912-13; Panama Pacific exposition issue; Single line watermark; Perforated 12 [2].
Manuscripts and Archives Division, The New York Public Library. "2c lake Pedro Miguel Locks, Panama Canal single"" The New York Public Library Digital Collections. 1912 - 1913. https://digitalcollections.nypl.org/items/5e66b3e9-1f37-d471-e040-e00a180654d7
Manuscripts and Archives Division, The New York Public Library. "2c lake Pedro Miguel Locks, Panama Canal single"" New York Public Library Digital Collections. Accessed March 16, 2025. https://digitalcollections.nypl.org/items/5e66b3e9-1f37-d471-e040-e00a180654d7
Manuscripts and Archives Division, The New York Public Library. (1912 - 1913). 2c lake Pedro Miguel Locks, Panama Canal single" Retrieved from https://digitalcollections.nypl.org/items/5e66b3e9-1f37-d471-e040-e00a180654d7
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/5e66b3e9-1f37-d471-e040-e00a180654d7 | title=
(still image)
2c lake Pedro Miguel Locks, Panama Canal single", (1912 - 1913)
|author=Digital Collections, The New York Public Library |accessdate=March 16, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>