Napo 2006 - European Agency for Safety and Health at Work.; Allgemeine Unfallversicherungsanstalt.; Health & Safety Executive.; Hessischen Verwaltung für Bodenmanagement und Geoinformation.; Istituto Nazionale Assicurazione contro gli Infortuni sul Lavoro.; Institut National de Recherche et de Securite.; SuvaPro. ([European Agency for Safety and Health at Work], 2007)