한국의동굴
By: Hanʾguk Tonggul Hyŏphoe pʻyŏnjŏ
Publisher: Paengminsa
Published: 1971
Place of publication: Sŏul
Language: kor
Subjects: Caves
Other titles: Hanʾguk ŭi tonggul
Table of contents: title: 1. Cheju-do Yongam tonggul.