21-segi ŭi chŏnʼgi tʻongsin.
Contributors: Hanʼguk Chŏnʼgi Tʻongsin Yŏnʼguso.
Publisher: Hanʼguk Chŏnʼgi Tʻongsin Yŏnʼguso
Published: 1984
Place of publication: [Seoul]
Language: kor
Number of pages: 265
Other titles: Isibil segi ŭi chŏnʼgi tʻongsin