Chŏngbu yanggok kwalli chŏngsanhwa yŏnʼgu
Subtitle: maechʻul ŏmmu mit sugŭp chaego pʻaak pumun.
Publisher: Hanʼguk Nongchʻon Kyŏngje Yŏnʼguwŏn
Published: 1980
Language: kor
Number of pages: 350