птица
52ОКОЛНА СРЕДА- MT
5211природна среда - BT1 фауна
- BT2 живот сред природата
- RT домашна птица (
5631) - RT птицевъдство (
5631) - RT птичи грип (
5631)
Mapping
- EXM gemet: GEMET (GEneral Multilingual Environmental Thesaurus - EEA)
- EXM unbis: Unbis (United Nations Thesaurus)
- EXM unesco: UNESCO (United Nations Educational, Scientific and Cultural Organization)
- EXM zbw: ZBW (Thesaurus for Econmics)
Bulgarian)