TY - GENERIC DO - 10.20944/preprints202105.0321.v1 UR - http://dx.doi.org/10.20944/preprints202105.0321.v1 TI - Design and Applications of Multi-Frequency Holographic Subsurface Radar: Review and Case Histories T2 - Preprints AU - Ivashov, Sergey I. AU - Capineri, Lorenzo AU - Bechtel, Tim AU - Inagaki, Masaharu AU - Razevig, Vladimir AU - Gueorguiev, Nikolay AU - Kizilay, Ahmet PY - 2021 DA - 2021/05/14 PB - Preprints