Columbia subject headings:
Europe, Central--Boundaries--Social aspects.
Europe, Eastern--Boundaries--History.
Europe, Eastern--Foreign relations.
Harvard subject headings:
Europe, Central--Boundaries--Social aspects.
Europe, Eastern--Boundaries--History.
Europe, Eastern--Foreign relations.
Princeton subject headings:
Adriatic Sea Region--Boundaries--Social aspects--Congresses.
Adriatic Sea Region--Historical geography--Congresses.
Borderlands--Adriatic Sea Region--Congresses.
Borderlands--Europe, Central--Congresses.
Collective memory--Adriatic Sea Region--Congresses.
Collective memory--Europe, Central--Congresses.
Europe, Central--Boundaries--Social aspects--Congresses.
Europe, Central--Historical geography--Congresses.