Hanʼguk 21-segi
By: [pʻyŏnja Yi Hong-gu oe]
Edition: Chʻopʻan
Publisher: Chosŏn Ilbosa
Published: 1987
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 328
Subjects: Twenty-first century; Forecasts; Social prediction