Yaedŭl i Yŏ Un-hyŏng Sŏnsaeng ŭi chanyŏdŭl iyo
By: Yŏ Yŏn-gu
Series: Ŏbŏi pʻum -- 2
Publisher: Chosŏn Nodongdang Chʻulpʻansa
Published: 1987
Place of publication: [Pʻyŏngyang]
Language: kor
Number of pages: 175
Subjects: Friends and associates; Biography