1.- CONVERSION FACTORS FOR EXTERNAL GAMMA DOSE DERIVED FROM NATURAL RADIONUCLIDES IN SOILS ELSEVIER; OXFORD; GBR; UNITED KINGDOM, 2004 Ver registro 2.- Is there a global geomorphic change coupled to economic activity? [publisher varies]; [location varies]; III; International, 2009 7th international conference on Geomorphology; ancient landscapes, modern perspectives Ver registro 3.- Natural and human forcing in recent geomorphic change; case studies in the Plata Basin [publisher varies]; [location varies]; III; International, 2009 7th international conference on geomorphology; Ancient landscapes; modern perspectives Ver registro