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Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. "An Essay on Duplex Apartments in general, and those at 471 Park Avenue in particular, by Richard Morton; Plan of Ground Floor." The New York Public Library Digital Collections. 1908. https://qa-digitalcollections.nypl.org/items/510d47db-9e92-a3d9-e040-e00a18064a99
Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. "An Essay on Duplex Apartments in general, and those at 471 Park Avenue in particular, by Richard Morton; Plan of Ground Floor." New York Public Library Digital Collections. Accessed November 23, 2024. https://qa-digitalcollections.nypl.org/items/510d47db-9e92-a3d9-e040-e00a18064a99
Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. (1908). An Essay on Duplex Apartments in general, and those at 471 Park Avenue in particular, by Richard Morton; Plan of Ground Floor. Retrieved from https://qa-digitalcollections.nypl.org/items/510d47db-9e92-a3d9-e040-e00a18064a99
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An Essay on Duplex Apartments in general, and those at 471 Park Avenue in particular, by Richard Morton; Plan of Ground Floor., (1908)
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