Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Tillægstraktat-da#Sense
Kompletterande fördrag-sv#Sense
Aanvullend verdrag-nl#Sense
Lisäsopimus-fi#Sense
Traité complémentaire-fr#Sense
Trattato aggiuntivo-it#Sense
Supplementary treaty-en#Sense