Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Korrespondensundervisning-sv#Sense
DU-sv#Sense
Undervisning pr. korrespondance-da#Sense
Enseignement par correspondance-fr#Sense
Kirjeopetus-fi#Sense
Fernunterricht-de#Sense
Briefunterricht-de#Sense
Distansundervisning-sv#Sense
Schriftelijk onderwijs-nl#Sense
Brevskole-da#Sense