Columbia subject headings:
Human settlements--Wales--History.
Iron age--Wales.
Wales--Antiquities, Roman.
Wales--Antiquities.
Wales--History--1063-1536.
Harvard subject headings:
Prehistoric peoples--Wales.
Wales--Antiquities.
Wales--History--To 1536.
Princeton subject headings:
Human settlements--Wales--History.
Wales--Antiquities.
Wales--Social conditions.