wapń
68PRZEMYSŁ- MT
6816metalurgia i hutnictwo - BT1 metal nieżelazny
- BT2 metal
Mapping
- EXM agrovoc: Agrovoc (FAO - Food and Agriculture Organization)
- EXM gemet: GEMET (GEneral Multilingual Environmental Thesaurus - EEA)
- EXM unesco: UNESCO (United Nations Educational, Scientific and Cultural Organization)
Polish)