Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Volo tecnico-it#Sense
Shop flight-en#Sense
Kontrollflygning-sv#Sense
Vol spécial-fr#Sense
Vuelo técnico-es#Sense
Werkstattflug-de#Sense
Vol usiné-fr#Sense
Volo speciale-it#Sense
Vol technique-fr#Sense
Huoltolento-fi#Sense