Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Block of postage stamps-en#Sense
Viererblock-de#Sense
Bloque de sellos de correos-es#Sense
Bloque de estampillas postales-es#Sense
Blok postzegels-nl#Sense
Bloc de timbres-poste-fr#Sense