Yi, Chae-hun, 1902- Yullihak / Yi Chae-hun chŏ. - Sŏul : Ŭryu Munhwasa, 4290 [1957] - 240 p. ; 21 cm. - Taehak chʻongsŏ . - Taehak chʻongsŏ (Ŭryu Munhwasa) . LCCN: k 60000679 Subjects--Topical Terms: Ethics. LC Class. No.: BJ1185.K3 / Y52 1957