Chʻangsalka ŭi haetpit
Subtitle: 20-yŏn tongan mugisuro oksok e innŭn abŏji ege ttŭiun ttal ŭi pʻyŏnji
By: O Su-gang
Edition: Chʻopʻan
Publisher: Haetpit Chʻulpʻansa
Published: 1990
Place of publication: Sŏul
Language: kor
Number of pages: 280
Subjects: Correspondence