Yŏng-a Chang

• Hojŏk chedo ŭi kaesŏn pangan e kwanhan yŏnʾgu
• Pubu chaesan kwanʼgye pʻallye e natʻanan yŏsŏng nodong ŭi kiyŏdo pʻyŏngka e kwanhan yŏnʼgu