Natrium
68INDUSTRIE- MT
6816Metallindustrie, Eisen und Stahl - BT1 NE-Metall
- BT2 Metall
Mapping
- EXM agrovoc: Agrovoc (FAO - Food and Agriculture Organization)
- EXM unbis: Unbis (United Nations Thesaurus)
- EXM unesco: UNESCO (United Nations Educational, Scientific and Cultural Organization)
German)