A.M.S. (Series) ; L751. "Edition 6-AMS (FEC)". Transverse Mercator projection. "Prepared by the Army Map Service (AM), U.S. Army, Washington, D.C. Redrawn in 1950 from Korea 1:50,000, Japanese Imperial Land Survey, Naep'yŏng-ni, 1942.... Aerial photography Jan., Mar., Oct. 1947.... Sino-Korean characters added, 1951 by the 64th Engineer Base Topographic Battalion." "Repro. by Engr. Topo. Det. 8173d".
