LRE thesaurus European Schoolnet europe,multimedia educational materials and Content of teaching, guidance, evaluation and administration 2010-09-22 2012-04-30 19:01:10 da astronomi Astronomie αστρονομία astronomy astronomía astronomia astronomie csillagászat astronomia אסטרונומיה sterrenkunde astronomi 2010-09-25 07:48:05