Columbia subject headings:
Europe--Politics and government--21st century--Bibliography.
European cooperation--Bibliography.
European federation--Bibliography.
Legal research--Europe.
Harvard subject headings:
Bibliographies.
Europe--Politics and government--21st century--Bibliography.
European cooperation--Bibliography.
European federation--Bibliography.
Legal research--Europe.
Princeton subject headings:
Europe--Politics and government--21st century--Bibliography.
European cooperation--Bibliography.
European federation--Bibliography.
Legal research--Europe.