Visé - Sint-Martens Voeren. Geological map of Wallonia at the scale 1/25.000. 34/7-8. Leaflet

Leaflet of the new geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous editions in 1896 (at 1/40.000, by Forir).Révision et 2ème éditionRévision de la carte géologique de Wallonie - Recherche collective d'intérêt généra