natrium
- UF sodium
68INDUSTRI- MT
6816metal-, jern- og stålindustri - BT1 ikkejernmetal
- BT2 metal
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)
Danish)