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Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "R.L. Polk & Co's map of the cities of Pittsburgh, Allegheny and environs " The New York Public Library Digital Collections. 1895. https://digitalcollections.nypl.org/items/74f99db0-57aa-0136-efda-5f28a0837730
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "R.L. Polk & Co's map of the cities of Pittsburgh, Allegheny and environs " New York Public Library Digital Collections. Accessed January 28, 2025. https://digitalcollections.nypl.org/items/74f99db0-57aa-0136-efda-5f28a0837730
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. (1895). R.L. Polk & Co's map of the cities of Pittsburgh, Allegheny and environs Retrieved from https://digitalcollections.nypl.org/items/74f99db0-57aa-0136-efda-5f28a0837730
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/74f99db0-57aa-0136-efda-5f28a0837730 | title=
(cartographic)
R.L. Polk & Co's map of the cities of Pittsburgh, Allegheny and environs , (1895)
|author=Digital Collections, The New York Public Library |accessdate=January 28, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>