이택경 Kim Se Yun RA JUNG WOONG 2024-01-13T23:32:12Z 2024-01-13T23:32:12Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/112693 English electromagnetics imaging underground Analysis of field patterns scattered by an underground void of circular cylinder Conference 1 Proceedings of ISAP '89, pp.393 - 396 Proceedings of ISAP '89 393 396 JA