Columbia subject headings:
Breconshire (Wales)--Antiquities.
Excavations (Archaeology)--Wales.
Neolithic period--Wales.
Tombs--Wales.
Wales--Antiquities.
Harvard subject headings:
Brecon (Wales)--Antiquities.
Cairns--Wales--Brecon.
Excavations (Archaeology)--Wales--Brecon.
Neolithic period--Wales--Brecon.
Wales--Antiquities.
Princeton subject headings: