Columbia subject headings:
Harvard subject headings:
Archaeological geology--Great Britain.
Excavations (Archaeology)--Great Britain
Excavations (Archaeology)--Great Britain--Congresses.
Gravel--Great Britain.
Great Britain--Antiquities--Congresses.
Great Britain--Antiquities.
Land settlement patterns--Great Britain.
Princeton subject headings:
Archaeological geology--Great Britain.
Gravel--Great Britain.
Great Britain--Antiquities.