Simbu tʻanʼgwang kaebal ŭl wihan kaengnae tʻonggi kaesŏn yŏnʼgu =
Subtitle: A study on the improvement of mine ventilation for the deep underground development of colliery
By: Kang Chʻang-hŭi ... [et al.].
Series: Yŏnʼgu tʻŭkpo / Chawŏn Kaebal Yŏnʼguso ; 18
Publisher: Chawŏn Kaebal Yŏnʼguso
Published: 1980
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 76