Ok-kŭn Han

1944

• Han'guk hŭigok chakka chakp'um yŏn'gu
• Han'guk tŭrama ŭi wisang =
• Hanʼguk chŏntʻonggŭk ŭi mihakchŏk tʼamgu
• Hanʼguk kojŏnʼgŭk yŏnʼgu
• Hŭigok ŭi ihae
• O Yŏng-jin yŏnʼgu
• Tansang ŭi hŭnjŏk
• Yŏnʼgŭk e natʻanan taejungsŏng
• Yŏnʼgŭk ŭi iron kwa silgi
• Yŏnʾgŭk ŭi ihae