Columbia subject headings:
Fish trade--Germany--History--To 1500.
Fisheries--Germany--History--To 1500.
Fishing--Germany--History--To 1500.
Harvard subject headings:
Fish trade--Germany--History--To 1500.
Fisheries--Germany--History--To 1500.
Fishing--Germany--History--To 1500.
Princeton subject headings:
Fish trade--Germany--History--To 1500.
Fisheries--Germany--History--To 1500.
Fishing--Germany--History--To 1500.