朝鮮民主主義人民共和國人權 朝鮮民主主義人民共和國集中營 Committee for Human Rights inNorthKorea: Satellite Imagery of the NorthKorean Gulag: Kwan-li-so No. 18 Bukchang Overview, p. 209
(PDF). The Committee for Human Rights inNorthKorea. [September 14, 2012]. (原始内容存档 (PDF)于2015-03-13). One Free Korea: Camp 12 – Chongori camp with satellite