This primary source comes from the Records of the National Park Service.
Full Citation: San Francisco, In Old Chinatown, Before the Fire; circa 1890 - 1935; El Camino Real; Henry Peabody Collection, 1959 - 1960; Records of the National Park Service, Record Group 79; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/san-francisco-in-old-chinatown-before-the-fire, May 12, 2024]