Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Eisenoxid-de#Sense
Iron oxide-en#Sense
Óxido de hierro-es#Sense
Ijzeroxide-nl#Sense
Οξείδιο του σιδήρου-el#Sense
Oxyde de fer-fr#Sense
Ferrous oxide-en#Sense
Jernoxid-da#Sense
Ossido di ferro-it#Sense
Óxido de ferro-pt#Sense