Chu, Pong-gyu.

• Hanʾguk nongŏp kyŏngjesa yŏnʾgu
• Hyŏndae tʻoji kyŏngjeron
• Hyŏndae nongŏp kyŏngjehak
• Ilche ha nongop kyongjesa
• Ilche ha nongŏp kyŏngjesa
• Tʻoji chŏngchʻaek
• Tʻoji kyŏngjehak