Columbia subject headings:
Harvard subject headings:
Christian slaves--Europe--History--To 1500.
Europe--History--476-1492.
Slave trade--Europe--History--To 1500.
Slavery and the church.
Slavery--Europe--History--To 1500.
Princeton subject headings:
Christian slaves--Europe--History--To 1500.
Europe--History--476-1492.
Slave trade--Europe--History--To 1500.
Slavery and the church.
Slavery--Europe--History--To 1500.