Kkum ŭi marat'onŏ
Subtitle: Chosŏnjok kiŏpka Yi Sŏng-il
By: Ch'a, Sun-bok
Publisher: Yŏnbyŏn Inmin Ch'ulp'ansa
Published: 2010
Place of publication: Yŏn'gil
Language: kor
Other titles: Chosŏnjok kiŏpka Yi Sŏng-il