Columbia subject headings:
Harvard subject headings:
Droitwich (England)--Antiquities.
Excavations (Archaeology)--England--Droitwich.
Salt industry and trade--England--Droitwich--History.
Princeton subject headings:
Droitwich (England)--Antiquities.
Excavations (Archaeology)--England--Droitwich.
Salt industry and trade--England--Droitwich--History.