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Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Survey of the Allegheny River from Franklin to Pittsburgh " The New York Public Library Digital Collections. 1828. https://qa-digitalcollections.nypl.org/items/5e0bd370-7edf-0135-d596-73a7ff7bf1db
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Survey of the Allegheny River from Franklin to Pittsburgh " New York Public Library Digital Collections. Accessed November 26, 2024. https://qa-digitalcollections.nypl.org/items/5e0bd370-7edf-0135-d596-73a7ff7bf1db
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. (1828). Survey of the Allegheny River from Franklin to Pittsburgh Retrieved from https://qa-digitalcollections.nypl.org/items/5e0bd370-7edf-0135-d596-73a7ff7bf1db
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/5e0bd370-7edf-0135-d596-73a7ff7bf1db | title=
(cartographic)
Survey of the Allegheny River from Franklin to Pittsburgh , (1828)
|author=Digital Collections, The New York Public Library |accessdate=November 26, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>