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Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Map of Pittsburgh and Allegheny cities " The New York Public Library Digital Collections. 1893. https://digitalcollections.nypl.org/items/24927010-d468-0135-f6d7-0cda5f985176
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Map of Pittsburgh and Allegheny cities " New York Public Library Digital Collections. Accessed June 21, 2025. https://digitalcollections.nypl.org/items/24927010-d468-0135-f6d7-0cda5f985176
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. (1893). Map of Pittsburgh and Allegheny cities Retrieved from https://digitalcollections.nypl.org/items/24927010-d468-0135-f6d7-0cda5f985176
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/24927010-d468-0135-f6d7-0cda5f985176 | title=
(cartographic)
Map of Pittsburgh and Allegheny cities , (1893)
|author=Digital Collections, The New York Public Library |accessdate=June 21, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>