Columbia subject headings:
European Union--Germany.
European Union--Poland.
Germany--Foreign relations--1990-
Germany--Foreign relations--Poland.
Poland--Foreign relations--1989-
Poland--Foreign relations--Germany.
Harvard subject headings:
European Union--Germany.
European Union--Poland.
Germany--Foreign relations--1990-
Germany--Foreign relations--Poland.
Poland--Foreign relations--1989-
Poland--Foreign relations--Germany
Princeton subject headings: