This primary source comes from the Records of the National Park Service.
Full Citation: San Francisco, The Modern Chinatown; 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-the-modern-chinatown, May 10, 2024]