Columbia subject headings:
Archaeology--Congresses.
Boats and boating--History--Congresses.
Ships, Wooden--History--Congresses.
Wood--Preservation--Congresses.
Harvard subject headings:
Archaeology--Congresses
Boats and boating--History--Congresses.
Ships, Wooden--History--Congresses.
Wood--Preservation--Congresses.
Princeton subject headings: