1. [東「ソ」/ 滿洲 / 東「ソ」外蒙古] 五十万分一圖 | 五十万分一地誌圖 -- 1:500,000 chishizu, Maps Index Datasets Stanford University Public content 1943. Stanford Geospatial Center. This polygon shapefile is an index to the map series, '[東「ソ」/ 滿洲 / 東「ソ」外蒙古] 五十万分一圖 | 五十万分一地誌圖 -- 1:500,000 chishizu.' This map series was original... Stanford Digital Repository.