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Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Indexed map of Pittsburgh and Allegheny, Penn." The New York Public Library Digital Collections. 1886. https://qa-digitalcollections.nypl.org/items/6bc3a350-d465-0135-73cf-0bb7e0966257
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Indexed map of Pittsburgh and Allegheny, Penn." New York Public Library Digital Collections. Accessed November 22, 2024. https://qa-digitalcollections.nypl.org/items/6bc3a350-d465-0135-73cf-0bb7e0966257
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. (1886). Indexed map of Pittsburgh and Allegheny, Penn. Retrieved from https://qa-digitalcollections.nypl.org/items/6bc3a350-d465-0135-73cf-0bb7e0966257
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/6bc3a350-d465-0135-73cf-0bb7e0966257 | title=
(cartographic)
Indexed map of Pittsburgh and Allegheny, Penn., (1886)
|author=Digital Collections, The New York Public Library |accessdate=November 22, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>