1619 20160222141731.0 SISMOimport-135 Collin, Fabienne 1997 Comparison of velocity cross section between the Stavelot Massif and South of the Brabant Massif obtained by inversion of seismic profiles. Camelbeeck, Thierry Aardkundige Mededelingen 8 1997 43-46 published in NONREF