Tonggul
By: U Kyŏng-sik.
Edition: Chʻopʻan
Series: Chisŏng chayŏnsa pangmulgwan (Series) -- 5
Publisher: Chisŏngsa
Published: 2002
Place of publication: Sŏul-si
Language: kor
Number of pages: 231
Subjects: Caves.; Caves -- Korea (South)