Columbia subject headings:
Harvard subject headings:
Associations, institutions, etc.--Europe, Central--History--Congresses.
Associations, institutions, etc.--Europe, Eastern--History--Congresses.
Nationalism--Europe, Central--History--Congresses.
Nationalism--Europe, Eastern--History--Congresses.
Princeton subject headings:
Associations, institutions, etc.--Europe, Central--History--Congresses.
Associations, institutions, etc.--Europe, Eastern--History--Congresses.
Nationalism--Europe, Central--History--Congresses.
Nationalism--Europe, Eastern--History--Congresses.