A.M.S. (Series) ; T531. First edition - AMS 1. Polyconic projection. "The longitude of this sheet is based on the meridian of Batavia." "Compiled from Wester-Afdeeling van Borneo 1:200,000 Top. Dienst Sheet 1, 1941; Netherlands Hydrographic Chart 282, 1938; U.S. Hydrographic Chart 3040, 1942. Boundaries revised from Atlas van Tropisch Nederland, 1938." On lower right corner, "Poelau Serasan, Sumatra".
