Kamchʻwŏjin suyongso
Subtitle: Pukhan ŭi kangje suyongso rŭl pʻongno handa = The hidden gulag
By: Deibit Hokʻŭ chiŭm ; Yi Chae-gwang omgim
Edition: Chʻopʻan. 
Publisher: Sidae Chŏngsin
Published: 2003
Place of publication: Sŏul-si
Language: kor
Number of pages: 240
Subjects: Concentration camps; History; Forced labor; Prisons; Political prisoners; Politics and government
Other titles: Hidden gulag
Work titles: Hidden gulag