Columbia subject headings:
Civil law--Congresses.
Common law--Congresses.
Comparative law--Congresses.
Harvard subject headings:
Civil law--Congresses.
Civil law.
Common law--Congresses.
Common law.
Comparative law--Congresses.
Law--Europe
Princeton subject headings:
Civil law--Europe.
Civil law--Great Britain.
Common law--Europe.
Common law--Great Britain.