Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/68
Is Reference of Ertsreductie-nl#Sense
Erzreduzierung-de#Sense
Redução dos minérios-pt#Sense
Ore reduction-en#Sense
Riduzione dei minerali-it#Sense
Reducción de minerales-es#Sense
Malmreduktion-da#Sense
Réduction des minerais-fr#Sense
Αναγωγή μεταλλευμάτων-el#Sense