Columbia subject headings:
Hansa towns--History--Congresses.
Harvard subject headings:
Germany--History--1517-1648.
Germany--History--To 1517.
Hansa towns--History--Congresses.
Hansa towns--History.
Princeton subject headings:
Germany--History--1517-1648.
Germany--History--To 1517.
Hansa towns--History.
Hanseatic League.