Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2831002
Is Reference of Steile Gradation-de#Sense
Gradation dure-fr#Sense
Harde gradatie-nl#Sense
Sharp gradation-en#Sense
Steep gradation-en#Sense
Gradazione dura-it#Sense