Columbia subject headings:
Salvage archaeology--Europe.
Shipbuilding--Europe.
Ships, Wooden--Europe--History.
Harvard subject headings:
Boatbuilding--History--Congresses.
Shipbuilding--History--Congresses.
Princeton subject headings:
Salvage archaeology--Europe.
Shipbuilding--Europe--History.
Ships, Wooden--Europe--History.
Sweden--Antiquities.