Kyŏngsŏng Cheguk Taehak kwa Tongyanghak yŏn'guHae-dong Yun, Chun-yŏng Chŏng · First published 2018Open the Tome
T'ŭraensŭnaesyŏnŏl chigu kongdongch'e rŭl hyanghayŏHae-dong Yun, Kyŏng-hwan O · First published 2018Open the Tome