Columbia subject headings:
European Union countries--Foreign relations--Congresses.
Germany--Foreign relations--Congresses.
International relations--History--21st century--Congresses.
Harvard subject headings:
European Union countries--Foreign relations--Germany--Congresses.
European Union--Foreign relations--Congresses.
Germany--Foreign relations--Congresses.
Germany--Foreign relations--European Union countries--Congresses.
International relations--21st century--Congresses.
Princeton subject headings:
European Union countries--Foreign relations--Germany--Congresses.
European Union--Foreign relations--Congresses.
Germany--Foreign relations--Congresses.
Germany--Foreign relations--European Union countries--Congresses.
International relations--21st century--Congresses.