планина
52ОКОЛНА СРЕДА- MT
5211природна среда - BT1 геофизична околна среда
- RT планинска гора (
5636) - RT планинска област (
1616) - RT планинско земеделие (
5606)
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)
- EXM zbw: ZBW (Thesaurus for Econmics)
Bulgarian)