Kangnaengi nongsa ŭi chonghapchŏk kigyehwa
By: [chippʻil Chu To-chʻŏl ; pʻyŏnjip Yi Chong-chʻŏn]
Contributors: Yi, Chong-chʻŏn
Publisher: Nongŏp Chʻulpʻansa
Published: 1987
Place of publication: [Pʻyŏngyang]
Language: kor
Number of pages: 271
Subjects: Corn; Machinery