Hwachʻa mŏmurŭm sigan tanchʻuk ŭi chʻoeryanghwa
By: [chŏja Kim, Sŏng-tʻaek ; pʻyŏnjip Han Pong-nyŏ]
Contributors: Han, Pong-nyŏ
Publisher: Chʻŏlto Chʻulpʻansa
Published: 1991
Place of publication: [Pʻyŏngyang]
Language: kor
Number of pages: 211
Subjects: Railroads; Management; Mathematical models
Notes: Cover title.