Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Dureté -fr#Sense
Härte -de#Sense
Hardness-en#Sense
Twardość -pl#Sense
Hardheid -nl#Sense
Hårdhet-sv#Sense
Dureza -es#Sense
Dureza -pt#Sense