نبذة مختصرة : 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 édition ; Révision de la carte géologique de Wallonie - Recherche collective d'intérêt général
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