Columbia subject headings:
Citizenship--European Economic Community countries--Congresses.
Citizenship--European Economic Community countries.
Emigration and immigration law--European Economic Community countries--Congresses.
Emigration and immigration law--European Economic Community countries.
Harvard subject headings:
Citizenship--European Economic Community countries.
Emigration and immigration law--European Economic Community countries.
Princeton subject headings:
Citizenship--European Economic Community countries--Congresses.
Emigration and immigration law--European Economic Community countries--Congresses.