Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/36
Is Reference of Sheaf of copunctal planes-en#Sense
Bundle of planes-en#Sense
Faisceau de plans passant par un point-fr#Sense
Plans concourants-fr#Sense
Vlakkenwaaier-nl#Sense
Ebenenbuendel-de#Sense