RT Journal Article SR Electronic(1) A1 Jacobs, F.YR 1995 T1 Earth Resistivity Tomography (ERT) and Cavity Investigation JF , VO OP SP cp-63-00037 DO https://doi.org/10.3997/2214-4609.201407422 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201407422