García Sánchez, A. Arsenic in soils and waters and its relation to geology and mining activities (Salamanca province, Spain) - Amsterdam Elsevier Science August 2003 - pp. 69-79 ilus. Subjects--Topical Terms: AGUAARSENICOCONTAMINACION DE SUELOSGEOQUÍMICAMOVILIDADROCASSUELOS Subjects--Geographic Terms: ESPAÑASALAMANCA