Title: Yŏchʻŏn siji : chiri, yŏksa, chŏngchʻi, sanŏp.
Authors: Yŏchʻŏnsi Munhwawŏn.
Publisher: Yŏchʻŏnsi Munhwawŏn,
Year: 1998
Subjects: Yŏchʻŏn-si (Korea) History.