Chŏng-ŭn Pak

• Chʻogi noin yŏsŏng ŭi sahoe chʻamyŏ pangan e kwanhan yŏnʼgu
• Chʻwiŏp yŏsŏng ŭi mosŏng poho piyong kwa chanyŏ yangyuk piyong ŭi sahoejŏk pundam pangsik e kwanhan yŏnʼgu