Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/7606
Is Reference of Verdenspostunionens dag-da#Sense
Journée mondiale de la poste-fr#Sense
World Post Day-en#Sense
Maailman Postiliiton päivä-fi#Sense
Día Mundial del Correo-es#Sense