Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/3221
Is Reference of 30-jaar-regel-nl#Sense
30-year rule-en#Sense
Dertig-jaar-regel-nl#Sense
Règle des trente ans-fr#Sense
30-års-reglen-da#Sense
Norma de los treinta años-es#Sense
Κανόνας των 30 ετών-el#Sense
30-Jahre-Frist-de#Sense
Regola dei trent'anni-it#Sense
Regra dos 30 anos-pt#Sense