This primary source comes from the Records of the National Archives and Records Administration.
Full Citation: The Business District of New York, Brooklyn, and Jersey City; 1913; Reference Maps and Drawings; Records of the National Archives and Records Administration, Record Group 64; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/business-district-new-york-brooklyn-jersey-city, May 12, 2024]