http://www.vocabularyserver.com/gemet/en/ GEMET Thesaurus EIONET EIONET 1998-12-31 en 2011-04-14 11:56:05 pollutant monitoring 2011-04-14 11:56:05http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=6469http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=4136http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=6438http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=6458