Columbia subject headings:
Harvard subject headings:
Citizenship--Europe, Eastern--Congresses.
Civil rights--Europe, Eastern--Congresses.
Political rights--Europe, Eastern--Congresses.
Social rights--Europe, Eastern--Congresses.
Princeton subject headings:
Citizenship--Europe, Eastern--Congresses.
Civil rights--Europe, Eastern--Congresses.
Political rights--Europe, Eastern--Congresses.
Social rights--Europe, Eastern--Congresses.