Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/3226
Is Reference of Post,Telephone and Telegraph-en#Sense
Poste Télégraphe Téléphone-fr#Sense
P.T.T.-fr#Sense
Poste,Telegrafi e Telefoni-it#Sense
PT&T-en#Sense
PTT-it#Sense