Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Turtäthet-sv#Sense
Schedule density-en#Sense
Einsatzhäufigkeit-de#Sense
Movimenti dei velivoli-it#Sense
Gebruiksfrequentie-nl#Sense
Sobrecarga de horários-pt#Sense
Διακίνηση αεροσκαφών-el#Sense
Movimientos de las aeronaves-es#Sense
Mouvements des avions-fr#Sense