Columbia subject headings:
Telecommunication policy--Europe--Congresses.
Telecommunication policy--Japan--Congresses.
Telecommunication--Europe--Congresses.
Telecommunication--Japan--Congresses.
Harvard subject headings:
Telecommunication policy--Europe--Congresses.
Telecommunication policy--Japan--Congresses.
Telecommunication--Europe--Congresses.
Telecommunication--Japan--Congresses.
Princeton subject headings: