https://vocabularyserver.com/cnr/ml/earth/it/ EARTh - Environmental Applications Reference Thesaurus CNR-IIA-EKOLab CNR-IIA-EKOLab 1998-11-30 it 2013-03-07 19:22:22 wolframati 2013-03-07 19:22:22https://vocabularyserver.com/cnr/ml/earth/it/xml.php?skosTema=23830