Columbia subject headings:
Ethnicity--Germany--Congresses.
Nationalism--Germany--History--Congresses.
Harvard subject headings:
Ethnicity--Germany--Congresses.
Europe--Relations--Germany--Congresses.
Germany--History--1517-1871--Congresses.
Germany--Relations--Europe--Congresses.
Nation-state--History--Congresses.
National characteristics, German--History--Congresses.
Nationalism--Germany--History--Congresses.
Princeton subject headings:
Ethnicity--Germany--Congresses.
Nationalism--Germany--History--Congresses.