Chŏng-ŭn Yi

1954

• 3.1 tongnip undong ŭi chibang siwi e kwanhan yŏnʼgu
• 3.1 undong ŭi ŏl Yu Kwan-sun
• Ilbon chegukchuŭi nŭn 3.1 Undong ŭl ŏttŏk'e t'anap haenna?
• Kim Sang-ok p'yŏngjŏn
• Koyang tongnip undongsa