I-hyŏk Kwŏn

• 21-segi rŭl hyanghan kukka palchŏn ŭi kibon panghyang
• Inʼgu, pogŏn, hwanʼgyŏng
• Mŏngnŭn pʻiimyak ŭi che hyoyul e kwanhan tʻonggyehakchŏk kochʻal
• The results and findings of the pretreatment status survey
• Tosi inʼgu chojŏl e kwanhan yŏnʼgu