Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Réfraction des lames-fr#Sense
Refraktion-sv#Sense
Aallon taipuminen-fi#Sense
Refracción de las olas-es#Sense
Refração das ondas-pt#Sense
Wave refraction-en#Sense
Rifrazione delle onde-it#Sense
Refractie van golven-nl#Sense
Bølgerefraktion-da#Sense
Διάθλαση-el#Sense
Vågomböjning-sv#Sense
Brechung der Wellen-de#Sense