Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Clay-en#Sense
Πυρίμαχο τούβλο-el#Sense
Tégla-hu#Sense
Ziegelstein-de#Sense
Schamottestein-de#Sense
Mattone di " chamotte " ( argilla refrattaria )-it#Sense
Brique alumineuse moulue-fr#Sense
Chamottesteen-nl#Sense
Brick-en#Sense