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Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. "Washington Headquarters, the Hasbrouck house" The New York Public Library Digital Collections. 1930-09-25. https://old-digitalcollections.nypl.org/items/510d47e4-83b5-a3d9-e040-e00a18064a99
Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. "Washington Headquarters, the Hasbrouck house" New York Public Library Digital Collections. Accessed September 18, 2026. https://old-digitalcollections.nypl.org/items/510d47e4-83b5-a3d9-e040-e00a18064a99
Irma and Paul Milstein Division of United States History, Local History and Genealogy, The New York Public Library. (1930-09-25). Washington Headquarters, the Hasbrouck house Retrieved from https://old-digitalcollections.nypl.org/items/510d47e4-83b5-a3d9-e040-e00a18064a99
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(still image)
Washington Headquarters, the Hasbrouck house, (1930-09-25)
|author=Digital Collections, The New York Public Library |accessdate=September 18, 2026 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>