Wŏnsŏ kangdok. Chʻodŭng kyoyukkwa
By: Yi Yong-gŏl, Yi Hong-u.
Publisher: Sŏul Taehakkyo Pusŏl Hanʼguk Pangsong Tʻongsin Taehak
Published: 1973
Language: kor
Number of pages: 21