1.- 200 YEARS OF MINING ACTIVITIES AT LA PAZ/SAN LUIS POTOSI/MEXICO; CONSEQUENCES FOR ENVIRONMENT AND GEOCHEMICAL EXPLORATION ELSEVIER; AMSTERDAM-NEW YORK; III; INTERNATIONAL, 1997 GEOCHEMICAL EXPLORATION 1995; II Ver registro 2.- Multi-scale geochemical mapping of soils; natural and anthropogenic patterns from the national to the local scale [International Geological Congress]; [location varies]; III; International, 2008 33rd international geological congress; abstracts Ver registro
