Chŏng-hyŏk Im

1955

• Chōsen kagaku bunkashi e no apurōchi
• Chōsen kagakushi ni okeru kinsei
• Chōsen kindai kagaku gijutsushi kenkyū
• Hyŏndae Chosŏn ŭi kwahakchadŭl
• 朝鮮科学史