Columbia subject headings:
Harvard subject headings:
Archaeological surveying--Ireland--Longford (County)
Longford (Ireland : County)--Antiquities.
Water-saturated sites (Archaeology)--Ireland--Longford (County)
Princeton subject headings:
Archaeological surveying--Ireland--Longford (County).
Longford (Ireland : County)--Antiquities.
Water-saturated sites (Archaeology)--Ireland--Longford (County).