Columbia subject headings:
Boats and boating--History--Congresses.
Shipbuilding--History--Congresses.
Ships--History--Congresses.
Harvard subject headings:
Boats and boating--History--Congresses.
Shipbuilding--History--Congresses.
Ships--History--Congresses.
Underwater archaeology--Congresses
Princeton subject headings:
Boats and boating--History--Congresses.
Excavations (Archaeology)--Congresses.
Shipbuilding--History--Congresses.
Ships--History--Congresses.
Underwater archaeology--Congresses.