Sŏ̆kchʻŏn Sin Tong-wan Paksa chŏngnyŏn tʻoeim kinyŏm munjipTong-wan Sin · First published 1997Open the Tome
Silchilchŏk t'onghap taebi Nam-Pukhan nongŏp kisul kyoryu hyŏmnyŏk kongdong ch'ujin kyehoekTong-wan Sin · First published 2002Open the Tome
Nam-Pukhan nongŏp kisul kyoryu, hyŏmnyŏk sebu sirhaeng kyehoekTong-wan Sin · First published 2001Open the Tome