特許廳20年史
By: [Pʻyŏnchʻanja Tʻŭkhŏchʻŏng Isimnyŏnsa Palgan Wiwŏnhoe]
Publisher: Tʻŭkhŏchʻŏng
Published: 1997
Place of publication: Seoul
Language: kor
Number of pages: 1025
Subjects: History; Korea (South). Tʻŭkhŏchʻŏng
Other titles: Tʻŭkhŏchʻŏng 20-yŏnsa; Tʻŭkhŏchʻŏng isimnyŏnsa