Beton
68INDUSTRIE- MT
6831Bauindustrie und öffentliches Bauwesen - BT1 Baustoffe
- BT2 Bauindustrie
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)
German)