Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Unité contributive-fr#Sense
Unit of contribution-en#Sense
Unidad contributiva-es#Sense
Beitragseinheit-de#Sense
Contributie-eenheid-nl#Sense
Bijdrage-eenheid-nl#Sense