Pʻyŏngchʻang tʻanjŏn chŏngmil chijil chosa pogosŏ
Publisher: Chawŏn Kaebal Yŏnʼguso; Tonga Ŭngyong Chijil Kʻonsŏltʻantʻŭ
Published: 1978
Language: kor
Number of pages: 32