Columbia subject headings:
Customary law--Europe--History.
Law--Europe--History.
Legislation--Europe--History.
Roman law--Influence.
Harvard subject headings:
Canon law--History
Customary law--Europe--History.
Europe--Social conditions--To 1492
Law, Medieval
Law--Europe--History
Roman law--Reception--Europe.
Princeton subject headings:
Customary law--Europe--History.
Law--Europe--History.
Legislation--Europe--History.
Roman law--Influence.