Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Northern Ireland--Londonderry (County)
Londonderry (Northern Ireland : County)--Antiquities.
Mesolithic period--Northern Ireland--Londonderry (County)
Mount Sandel Site (Northern Ireland)
Princeton subject headings:
Derry (Northern Ireland)--Antiquities.
Excavations (Archaeology)--Northern Ireland.
Mount Sandel (Londonderry, Northern Ireland)
Northern Ireland--Antiquities.