Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2831002
Is Reference of Chambre à optique d'inversion-fr#Sense
Camera provided with a reversal system-en#Sense
Camera met omkeeroptiek-nl#Sense
Apparecchio con sistema d'inversione-it#Sense
Kamera mit Umkehrsystem-de#Sense