Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Fremdgasgehalt-de#Sense
Gas estraneo-it#Sense
Gas extraño-es#Sense
Ξένο αέριο-el#Sense
Gaz étranger-fr#Sense
Främmande gas-sv#Sense
Vreemdgasgehalt-nl#Sense
Gases estranhos-pt#Sense
Foreign gas-en#Sense
Fremmede gasarter-da#Sense
Vieras kaasu-fi#Sense
«ar» no colo-pt#Sense