Czad
- UF Republika Czadu
72GEOGRAFIA- MT
7221Afryka - BT1 Afryka Środkowa
- BT2 Afryka Subsaharyjska
- MT
7231geografia gospodarcza - BT1 kraje AKP
- BT1 kraje CEMAC
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)
- EXM zbw: ZBW (Thesaurus for Econmics)
Polish)