RT Journal Article SR Electronic(1) A1 Bergmann, T. A1 Holliger, K. A1 Leckebusch, J.YR 1997 T1 Finite-difference modeling of ground-penetrating radar data: The zero-offset approximation JF , VO OP SP cp-95-00017 DO https://doi.org/10.3997/2214-4609.201407278 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201407278