Kamok ŭro putʻŏŭi sasaek
Subtitle: Tʻonghyŏktang sakŏn mugisu Sin Yŏng-bok pʻyŏnji
Publisher: Haetpit Chʻulpʻansa
Published: 1988
Place of publication: Sŏul
Language: kor
Number of pages: 306
Subjects: Correspondence; Political prisoners