Letter from Dr. Sergio Romero Gonzales to John M. Clark, re: Thank you for English grammar books, August 31, 1943
written by Sergio Romero, fl. 1943, in Records of the Office of Inter-American Affairs, 1918 - 1951 (RG229). General Records of the El Oro Technical Mission, 1942 - 1944 (I-7 152), of United States. National Archives and Records Administration. Federal Records (1943), Box 1709, I ad) Reports, Other Special , 1 page(s)