Columbia subject headings:
Harvard subject headings:
Boundaries--Social aspects--Congresses.
Boundaries--Social aspects--History--Congresses.
Civilization, Modern--History--Congresses.
Globalization--Social aspects--Congresses
Nation-building--History--Congresses.
Princeton subject headings:
Boundaries--Social aspects--Congresses.
Boundaries--Social aspects--History--Congresses.
Civilization, Modern--History--Congresses.
Globalization--Social aspects--Congresses.
Nation-building--History--Congresses.