Thésaurus de l’USGS (US Geological Survey) (USGS)
Descriptors 676, Nonpreferred terms 872, Scope notes 615, Descriptors 676 ; Nonpreferred terms 872 ; Scope notes 615.
Descriptors 676, Nonpreferred terms 872, Scope notes 615, Descriptors 676 ; Nonpreferred terms 872 ; Scope notes 615.