Ko-san O

• Chosa ŭi sŏnhwa
• Chuhae Yumagyŏng kangsŏl
• Hanʼguk Pulgyo taesajŏn
• Hanʾguk Pulgyo taesajŏn
• Pulcha suji toksonggyŏng
• Taesŭng kisillon kangŭi
• Tohae pʻalsangnok