A.M.S. (Series) ; L751. "AMS 1". "Prepared under the direction of the Chief of Engineers by the Army Map Service (CV), U.S. Army, Washington, D.C. Copied in 1945 from Korea 1:50,000, Japanese Imperial Land Survey, Chinju, 1918." Portions of map's lower edge lacking, cropping some marginal content. On verso: sheet 6918 IV, Koje-do, from Korea 1:50,000 set.