Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of ITSS-it#Sense
IFICF-fr#Sense
Ispettorato tecnico delle officine svizzere del gas-it#Sense
Inspection fédérale des installations à courant fort-fr#Sense
TISG-de#Sense
Technisches Inspektorat Schweizerischer Gaswerke-de#Sense