Columbia subject headings:
Excavations (Archaeology)--England--Lincoln.
Fortification, Roman--England--Lincoln.
Lincoln (England)--Antiquities, Roman.
Harvard subject headings:
Excavations (Archaeology)--England--Lincoln.
Fortification, Roman--England--Lincoln.
Lincoln (England)--Antiquities, Roman.
Lincolnshire (England)--Antiquities, Roman.
Princeton subject headings: