Columbia subject headings:
Communication and traffic--Social aspects--Japan--Congresses.
Communication and traffic--Social aspects--United States--Congresses.
Japan--Social conditions--1945---Congresses.
United States--Social conditions--1960-1980--Congresses.
Harvard subject headings:
Communication and traffic--Social aspects--Japan--Congresses.
Communication and traffic--Social aspects--United States--Congresses.
Japan--Social conditions--1945---Congresses.
United States--Social conditions--1960-1980--Congresses.
Princeton subject headings:
Communication and traffic--Social aspects--Japan--Congresses.
Communication and traffic--Social aspects--United States--Congresses.
Japan--Social conditions--1945---Congresses.
United States--Social conditions--1960-1980--Congresses.