Kyu-chʻŏl Yi

1962

• Sŏbisŭ chihyang akʻitʻekchʻŏ kiban ŭi e-pijŭnisŭ kisul pʻyojun e taehan yŏnʼgu =
• Sŏbisŭ chihyang akʻitʻekchʻŏ kiban ŭi e-pijŭnisŭ kisul pʻyojun e taehan yŏnʼgu =