宇宙의神秘
Subtitle: sigong sok ŭi uju, inʾgan, UFO
By: Cho Kyŏng-chʻŏl chŏ
Publisher: Sichʻŏnggak Kyoyuksa
Published: 1977
Place of publication: Sŏul
Language: kor
Number of pages: 280
Subjects: Space sciences
Other titles: Uju ŭi sinbi