Columbia subject headings:
Atlantic Ocean Region--Commerce--Baltic States--Congresses.
Atlantic Ocean Region--Commerce--History--Congresses.
Atlantic Ocean Region--Commerce--North Sea Region--Congresses.
Atlantic Ocean Region--Economic conditions--Congresses.
Baltic States--Commerce--Atlantic Ocean Region--Congresses.
Baltic States--Commerce--History--Congresses.
Baltic States--Economic conditions--Congresses.
Europe--Commerce--History--Congresses.
Europe--Economic conditions--Congresses.
North Sea Region--Commerce--Atlantic Ocean Region--Congresses.
North Sea Region--Commerce--History--Congresses.
North Sea Region--Economic conditions--Congresses.
Harvard subject headings:
Atlantic Ocean Region--Commerce--Baltic States--Congresses.
Baltic States--Commerce--Atlantic Ocean Region--Congresses.
Baltic States--Commerce--History--Congresses.
Baltic States--Economic conditions--Congresses.
Baltic States--Foreign economic relations--Europe--Congresses.
Europe--Commerce--History--Congresses.
Europe--Economic conditions--Congresses.
Europe--Foreign economic relations--Baltic States--Congresses.
North Sea Region--Commerce--History--Congresses.
Princeton subject headings:
Europe--Economic conditions--Congresses.