Sanŏp kisul yŏnʼgwan e kwanhan yŏnʼgu
By: [Chʻoe Yŏng-bak tŭng chŏ]
Publisher: Kwahak Kisulchʻŏ
Published: 1969
Place of publication: [Sŏul]
Language: kor
Number of pages: 438
Subjects: Technology