Columbia subject headings:
Harvard subject headings:
Germany--Civilization--Congresses.
Germany--Foreign public opinion, Polish--Congresses.
Germany--Relations--Poland--Congresses.
Museums--Poland--Congresses.
Poland--Civilization--German influences--Congresses.
Poland--Relations--Germany--Congresses
Princeton subject headings:
Germans--Poland--History.
Germany--Foreign public opinion, Polish--History.
Poland--Ethnic relations.
Poland--History--Occupation, 1939-1945.