Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/3606002
Is Reference of Material birrefringente-es#Sense
Matériau biréfringent-fr#Sense
Materiale birifrangente-it#Sense
Birefringent material-en#Sense
Doppelbrechender Werkstoff-de#Sense