France (3) Publics (3) France (3) Auvergne (2) Puy-de-Dôme (2) Portugal (2) Economic conditions (2) Density (2) Assaying (2) Dating (2) Methodology (2) Fiction (2) Land mines (2) Rooms (2) Global Positioning System (2) Wetlands (2) Watersheds (2) Water (2) Swamps (2) Strip mining (2) Signatures (Writing) (2) Signals and signaling (2) Prospecting (2) Possibility (2) Ponds (2) Pollution (2) Peatlands (2) Peat bogs (2) Palynology (2) Mines and mineral resources (2)