Chŏngsŏn tʻanjŏn kaebal pangan yŏnʼgu
By: Hong Chi-sang ... [et al.] = Study for the development of the Jeongseon coalfield / by Hong, Jee Sang ... [et al.]
Series: Yŏnʼgu tʻŭkpo = KIER bulletin ; 22
Publisher: Hanʼguk Tongnyŏk Chawŏn Yŏnʼguso
Published: 1981
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 141