Columbia subject headings:
Excavations (Archaeology)--Wales--Powys.
Powys (Wales)--Antiquities.
Harvard subject headings:
Excavations (Archaeology)--Wales--Powys.
Fortification, Roman--Wales.
Powys (Wales)--Antiquities, Roman.
Romans--Wales.
Princeton subject headings:
Caersws Site (Wales)
Excavations (Archaeology)--Wales--Powys.
Powys (Wales)--Antiquities, Roman.
Romans--Wales--Powys.