Natoye-Ciney. Carte géologique de Wallonie. 48/3-4. Notice explicative ; Geological map of Wallonia (Belgium) at the scale of 1/25.000, Natoye-Ciney 54/1-2. Leaflet

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 1882-83 (1/20.000, by Dupont, Mourlon and Purves) and 1905 (1/40.000, by Mourlon and Dewalque). ; Révision ; Révision de la carte géologique de Wallonie - Recherche collective d'intérêt général