Columbia subject headings:
Harvard subject headings:
Collective memory--Europe--Congresses.
Europe--History--Congresses.
Germans--Europe--Congresses.
Germany--Foreign relations--Poland--Congresses.
Group identity--Europe--Congresses.
Poland--Foreign relations--Germany--Congresses.
Polish people--Europe--Congresses.
Princeton subject headings:
Germany--Foreign relations--Poland--Congresses.
Poland--Foreign relations--Germany--Congresses.