Columbia subject headings:
Harvard subject headings:
Citizenship--Europe
Local government--Europe--Citizen participation.
Naturalization--Europe.
Noncitizens--Europe--Political activity.
Noncitizens--Political activity--Europe.
Political participation--Europe
Princeton subject headings:
Citizenship--Europe--Congresses.
Naturalization--Europe--Congresses.
Noncitizens--Europe--Civil rights--Congresses.
Noncitizens--Europe--Political activity--Congresses.