%0 Journal Article %A Pérez Graia, V. %A G. Pujades, L. %A A. Canas, J. %A Clapés, J. %A Osorio, R. %A Garcia, F. %A Caselles, O. %T Study of voids and cavities using GPR %D 1998 %J , %V %@ 2214-4609 %C cp-43-00095 %R https://doi.org/10.3997/2214-4609.201407120 %I European Association of Geoscientists & Engineers, %X %U https://www.earthdoc.org/content/papers/10.3997/2214-4609.201407120