Wŏn-dong Yu

• Hang̕uk kŭndae sahoe kyŏngjesa yŏng̕u
• Hanʼguk hyŏndae sahoe wa sasangjŏk che munje
• Hanʼguk kŭndae kyŏngjesa yŏnʼgu
• Hanʼguk sa taeyo
• Hanʼguk sirhak kaeron
• Yijo hugi sangŏp sa yŏnʼgu
• Yijo hungi sanggongŏpsa yordnʻgu