Nong susanmul kagong kongŏp yuksŏng e kwanhan chosa yŏnʼguHanʼguk Nongŏp Kyŏngje Yŏnʼguso · First published 1969Open the Tome
E Han nong ye ji xie hua dian qi hua ci dianBeijing nong ye ji xie hua xue yuan. E yu jiao yan shi · First published 1963Open the Tome