Columbia subject headings:
Dyfed (Wales)--Antiquities, Roman.
Excavations (Archaeology)--Wales--Dyfed.
Harvard subject headings:
Dyfed (Wales)--Antiquities.
Earthworks (Archaeology)--Wales--Dyfed.
Excavations (Archaeology)--Wales--Dyfed.
Princeton subject headings:
Dyfed (Wales)--Antiquities, Roman.
Excavations (Archaeology)--Wales--Dyfed.