Sahoejŏk pʻiryo nodong sigan kyesan kwa kyŏngje kwalli ŭi kaesŏn
By: Pak Tong-wŏn
Publisher: Sahoe Kwahak Chʻulpʻansa
Published: 1992
Place of publication: [Pʻyŏngyang]
Language: kor
Number of pages: 247
Subjects: Hours of labor; Labor productivity
Notes: Cover title.