Columbia subject headings:
European Union countries--Relations--Mediterranean Region.
European Union--Mediterranean Region.
European Union--Middle East.
Mediterranean Region--Relations--European Union countries.
Mediterranean Region--Strategic aspects.
National security--Mediterranean Region.
North Atlantic Treaty Organization--Mediterranean Region.
North Atlantic Treaty Organization--Middle East.
Harvard subject headings:
European Union--Membership.
Mediterranean Region--Foreign relations.
North Atlantic Treaty Organization--Membership.
Princeton subject headings: