Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/12
Is Reference of Välttämätön ehto-fi#Sense
Ehdoton edellytys-fi#Sense
Conditio sine qua non-it#Sense
Conditio sine qua non-la#Sense
Condition sine qua non-fr#Sense