1954. Harvard Map Collection, Harvard College Library. This layer is a georeferenced raster image of the Army Map Service (AMS) Series L500, China 1:250,000 topographic map of the Ch'ang-li (Changli) re... United States. Army Map Service.
1990. CHGIS, Harvard Yenching Insitute. point features showing populated places and natural features in Liaoning Province, China (circa 1990) 1990 GNS Placenames New for Version 4 are m... CHGIS, Harvard Yenching Institute.