율곡이이／
By: Kim Pyŏng-o chiŭm
Series: Segye kojŏn chŏnjip
Publisher: Hanʾguk Chayu Kyoyuk Hyŏphoe
Published: 1973
Place of publication: Sŏul
Language: kor
Number of pages: 237
Other titles: Yulgok Yi I
Notes: 1972 printing