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Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Reconnaissance of the entrances to Vermilion Bay & Calcasieu River, Louisiana " The New York Public Library Digital Collections. 1855. https://digitalcollections.nypl.org/items/198aacd0-2384-0135-5426-45ac262c51e7
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Reconnaissance of the entrances to Vermilion Bay & Calcasieu River, Louisiana " New York Public Library Digital Collections. Accessed January 28, 2025. https://digitalcollections.nypl.org/items/198aacd0-2384-0135-5426-45ac262c51e7
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. (1855). Reconnaissance of the entrances to Vermilion Bay & Calcasieu River, Louisiana Retrieved from https://digitalcollections.nypl.org/items/198aacd0-2384-0135-5426-45ac262c51e7
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/198aacd0-2384-0135-5426-45ac262c51e7 | title=
(cartographic)
Reconnaissance of the entrances to Vermilion Bay & Calcasieu River, Louisiana , (1855)
|author=Digital Collections, The New York Public Library |accessdate=January 28, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>