%0 Journal Article %A Niederleithinger, E. %A Plaumann, G. %T Recent advances in engineering geophysics Spectral IP and Multifrequency EM %D 1999 %J , %V %@ 2214-4609 %C cp-35-00049 %R https://doi.org/10.3997/2214-4609.201406416 %I European Association of Geoscientists & Engineers, %X %U https://www.earthdoc.org/content/papers/10.3997/2214-4609.201406416