Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--England--Ribchester.
Great Britain--History--Roman period, 55 B.C.-449 A.D.
Ribchester (England)--Antiquities.
Princeton subject headings:
England--Antiquities, Roman.
Excavations (Archaeology)--England--Ribchester (Lancashire).
Fortification, Roman--England--Ribchester (Lancashire).
Ribchester (Lancashire)--Antiquities, Roman.