Yu-han Wŏn

• Chosŏn hugi hwapʻye yutʻongsa
• Chosŏn hugi hwapʻyesa yŏnʼgu
• Chosŏn hugi hwapʻyesa yŏnʾgu
• Yijo Sukchong sidae ŭi chujŏn e taehayŏ