Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/68
Is Reference of Raffinazione dell'allumina-it#Sense
Εξευγενισμός αλουμίνας-el#Sense
Aluminiumraffinage-nl#Sense
Aluminiumoxidraffination-de#Sense
Refinação de alumina-pt#Sense
Alumina refining-en#Sense
Refinado de alúmina-es#Sense
Raffinage de l'alumine-fr#Sense
Alumiinioksidin jalostus-fi#Sense
Förädling av aluminium-sv#Sense