Columbia subject headings:
Border security--European Union countries--Congresses.
Europe--Economic integration--Congresses.
European Neighbourhood Policy (Program)--Congresses.
European Union countries--Boundaries--Congresses.
European Union countries--Emigration and immigration--Congresses.
European Union countries--Foreign relations--Congresses.
Harvard subject headings:
Border security--European Union countries--Congresses.
Europe--Economic integration--Congresses.
European Neighbourhood Policy (Program)--Congresses.
European Union countries--Boundaries--Congresses.
European Union countries--Emigration and immigration--Congresses.
European Union countries--Foreign relations--Congresses.
Princeton subject headings: