Chosŏn'guk Susinsa Kim Towŏn kwan'gyejipHong-jip Kim, Wi Kang, Sōhachirō Soga, I-ho Ch'oe, Yŏng-sim Cho · First published 2018Open the Tome
Kisa p'ungmun tongdo p'iltam Namgung Sŏnsaeng kangyŏ tongnamI-ho Ch'oe · First published 2017Open the Tome