Kwallija 25-si
Subtitle: chʻangjojŏgin kwallija ŭi kil
By: Chŏng Hyŏn-pʻil chŏ.
Publisher: Tonggwang Chʻulpʻansa
Published: 1983
Place of publication: Sŏul
Language: kor
Number of pages: 285
Subjects: Executive ability.
Other titles: Kwallija isibosi.