zilver
68INDUSTRIE- MT
6816metaal- en staalindustrie - BT1 edel metaal
- BT2 metaal
Mapping
- EXM agrovoc: Agrovoc (FAO - Food and Agriculture Organization)
- EXM gemet: GEMET (GEneral Multilingual Environmental Thesaurus - EEA)
- EXM unbis: Unbis (United Nations Thesaurus)
- EXM zbw: ZBW (Thesaurus for Econmics)
Dutch)