Jeju Island Geopark - A Volcanic Wonder of KoreaKyung Sik Woo, Young Kwan Sohn, Seok Hoon Yoon · First published 2013Open the Tome
Marine Geology of Korean SeasSung Kwun Sung Kwun Chough, Hee Jun Hee Jun Lee, Seok Hoon Seok Hoon Yoon · First published 2000Open the Tome
