Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2831002
Is Reference of Hulplaag-nl#Sense
Couche auxiliaire-fr#Sense
Auxiliary layer-en#Sense
Strato ausiliario-it#Sense
Strato supplementare-it#Sense
Hilfsschicht-de#Sense