Nodong saengsansŏng chʻŭkchŏng e kwanhan yŏnʼgu
Subtitle: Hanʼguk inswae kongjang ŭl chungsim ŭro
By: Kim Hŭng-wŏn [chechʻul]
Published: 1966
Place of publication: [Sŏul]
Language: kor
Number of pages: 152
Subjects: Labor productivity