Columbia subject headings:
Archaeology--Wales--Congresses.
Wales--Antiquities--Congresses.
Harvard subject headings:
Archaeology--Research--Wales--Congresses.
Archaeology--Wales--Congresses.
Excavations (Archaeology)--Wales--Congresses.
Wales--Antiquities--Congresses.
Princeton subject headings:
Archaeology--Wales--Congresses.
Wales--Antiquities--Congresses.