Columbia subject headings:
Thames River Estuary (England)--Antiquities.
Thames River Estuary (England)--History.
Underwater archaeology--England--Thames River Estuary.
Harvard subject headings:
Dredging--England--Thames River Estuary.
Excavations (Archaeology)--England--Thames River Estuary.
London Gateway (England)
Thames River Estuary (England)--Antiquities.
Thames River Estuary (England)--History.
Underwater archaeology--England--Thames River Estuary.
Princeton subject headings:
Dredging--England--Thames River Estuary.
Excavations (Archaeology)--England--Thames River Estuary.
London Gateway (England)
Thames River Estuary (England)--Antiquities.
Thames River Estuary (England)--History.
Underwater archaeology--England--Thames River Estuary.