Columbia subject headings:
Hamburg (Germany)--Civilization--Congresses.
Hamburg (Germany)--Social life and customs--Congresses.
Political culture--Germany--Hamburg--Congresses.
Harvard subject headings:
Hamburg (Germany)--Civilization--Congresses.
Hamburg (Germany)--Social life and customs--Congresses.
Political culture--Germany--Hamburg--Congresses.
Princeton subject headings:
Hamburg (Germany)--Civilization--Congresses.
Hamburg (Germany)--Social life and customs--Congresses.
Political culture--Germany--Hamburg--Congresses.