Columbia subject headings:
Acculturation--Philosophy--Congresses.
Boundaries--Social aspects--Philosophy--Congresses.
Buffer states--Philosophy--Congresses.
Harvard subject headings:
Acculturation--Philosophy--Congresses.
Boundaries--Social aspects--Philosophy--Congresses.
Buffer states--Philosophy--Congresses.
Princeton subject headings:
Acculturation--Philosophy--Congresses.
Boundaries--Social aspects--Philosophy--Congresses.
Buffer states--Philosophy--Congresses.