http://www.vocabularyserver.com/gemet/en/ GEMET Thesaurus EIONET EIONET 1998-12-31 en 2011-04-14 11:55:34 acoustic insulation 2011-04-14 11:55:34http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=4518http://www.vocabularyserver.com/gemet/en/xml.php?skosTema=5654