Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Karheus-fi#Sense
Rauheit-de#Sense
Ruhed-da#Sense
Ruwheid-nl#Sense
Rugosidade-pt#Sense
Rugosité d'un papier-fr#Sense
Roughness of a paper-en#Sense
Rugosità-it#Sense
Τραχύτητα χαρτιού-el#Sense