Kim Sang Wook HYUN SEUNG-YEUP Jeong-Hak Lee Sung-Yong Lee Cho Jae Hyoung Kuk-Taek Oh Kim, Se Yun 2024-01-13T05:32:35Z 2024-01-13T05:32:35Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/103136 English borehole radar underground The development of a pulse borehole radar system for underground cavity detection Conference 1 The 9th Workshop on Subsurface EM measurement, pp.93 - 97 The 9th Workshop on Subsurface EM measurement 93 97 KO