Columbia subject headings:
Baltic Sea Region--Commerce--History.
Business networks--Baltic Sea Region--History--To 1500.
Business networks--North Sea Region--History--To 1500.
Hansa towns--History.
Hanseatic League--History.
Merchants--Baltic Sea Region--History--To 1500.
Merchants--North Sea Region--History--To 1500.
North Sea Region--Commerce--History.
Harvard subject headings:
Baltic Sea Region--Commerce--History.
Business networks--Baltic Sea Region--History--To 1500.
Business networks--North Sea Region--History--To 1500.
Hansa towns--History.
Hanseatic League--History.
Merchants--Baltic Sea Region--History--To 1500.
Merchants--North Sea Region--History--To 1500.
North Sea Region--Commerce--History.
Princeton subject headings:
Baltic Sea Region--Commerce--History.
Business networks--Baltic Sea Region--History--To 1500.
Business networks--North Sea Region--History--To 1500.
Hansa towns--History.
Hanseatic League--History.
Merchants--Baltic Sea Region--History--To 1500.
Merchants--North Sea Region--History--To 1500.
North Sea Region--Commerce--History.