Sang-hŭi Yi

1929

• Chosŏnjo sahoe ŭi kʻŏmyunikʻeisyŏn hyŏnsang yŏnʼgu
• Hyŏndae sahoe wa kʻŏmyunikʻeisyŏn iron
• Tasi ŏllon chayu rŭl saenggak handa