Columbia subject headings:
Boards of trade--History--Congresses.
Commerce--History--Congresses.
Commercial associations--History--Congresses.
Maritime law--History--Congresses.
Trade associations--History--Congresses.
Harvard subject headings:
Boards of trade--Mediterranean Region--History--Congresses.
Foreign trade regulation--Mediterranean Region--History--Congresses.
Mediterranean Region--Commerce--History--Congresses.
Princeton subject headings: