Wan-hoe Ku

1957

• Chechʻŏn ŭibyŏng ŭi chonghapchŏk ihae
• Hanmal Chechʻŏn ŭibyŏng yŏnʼgu
• Hanmal ŭi Chechʻŏn ŭibyŏng
• Kugyŏk Chech'ŏn ŭibyŏng charyo