Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/3226
Is Reference of Segnalazione ad una frequenza-it#Sense
Single-frequency signalling-en#Sense
Enfrekvenssignalering-sv#Sense
Sinalização de frequência simples-pt#Sense
Signalisation à une fréquence-fr#Sense
Einfrequenz-Tonwahl-de#Sense
Yksitaajuusmerkinanto-fi#Sense
Μονοσυχνική σηματοδότηση-el#Sense
Single-frequency signaling-en#Sense
Señalización con una frecuencia-es#Sense
Eenfrequentiesignalering-nl#Sense
Enkeltfrekvenssignalering-da#Sense