Ch'oyŏn'gyŏl sahoe ŭi torae wa uri ŭi mirae / Yu Yŏng-sŏng, Kim Hyŏn-jung, Yi Sang-dae, Chŏng Chin-myŏng, Chi U-sŏk, Ch'ŏn-Yŏng-sŏk, Ch'oe Min-sŏk chiŭmYŏng-sŏng Yu · First published 2014Open the Tome
Yu Sŏng-nyong, Kim Sŏng-il, Cho Hŏn, Kwak Chae-u, U Sŏng-jŏn, oeNak-hun Sŏng · First published 1977Open the Tome