Yŏntʻan sobi siltʻae chosa mit minsuyong yŏllyo taechʻaek =
Subtitle: Survey on briquette consumption behavior and fuel energy policies in private sector.
Publisher: Hanʼguk Chonghap Enŏji Yŏnʼguso, Tongnyŏk Chawŏnbu
Published: 1980
Language: kor
Number of pages: 404