Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2021
Is Reference of Double-checking system-en#Sense
Stelsel van dubbele controle-nl#Sense
Système de double contrôle-fr#Sense
Sistema de controlo duplo-pt#Sense
Kaksinkertaisen tarkkailun järjestelmä-fi#Sense
Sistema di duplice controllo-it#Sense
System der doppelten Kontrolle-de#Sense
Σύστημα διπλού ελέγχου-el#Sense