Tʻongsin pumun kyehoek, 1987-1991
Subtitle: che 6-chʻa kyŏngje sahoe palchŏn 5-kaenyŏn kyehoek
Publisher: Chʻesinbu
Published: 1986
Place of publication: [Seoul]
Language: kor
Number of pages: 151
Subjects: Telecommunication policy; Postal service
Notes: Errata slip inserted.