Pon-gwan Ku

• 15-segi kugŏ pʻasaengpŏp e taehan yŏnʾgu
• Han'gugŏ munpŏp ch'ongnon
• Han'gugŏhak kaeron
• Ŏhwi kyoyungnon
• Ŏnŏ chungsim ŭi kyokwa yunghap kyoyuk