Columbia subject headings:
Germans--Study and teaching--Europe, Eastern--Congresses.
Germany--Relations--Poland--Congresses.
Germany--Study and teaching--Poland--Congresses.
Poland--Relations--Germany--Congresses.
Harvard subject headings:
Germans--Poland--History--Congresses.
Germans--Study and teaching--Europe, Eastern--Congresses.
Germany--Relations--Poland--Congresses.
Germany--Study and teaching--Poland--Congresses.
Poland--Civilization--1945---Congresses.
Poland--Relations--Germany--Congresses
Princeton subject headings:
Germans--Poland--History--Congresses.
Poland--Civilization--1945---Congresses.