Columbia subject headings:
Harvard subject headings:
Coastal archaeology--Germany--Hedwigenkoog.
Dithmarschen (Germany)--Antiquities.
Excavations (Archaeology)--Germany--Dithmarschen.
Hedwigenkoog (Germany)--Antiquities.
Shipwrecks--Germany--Hedwigenkoog.
Princeton subject headings:
Dithmarschen (Germany)--Antiquities.
Excavations (Archaeology)--Germany--Dithmarschen.
Ships--Germany--History--17th century.
Ships--Germany--History--18th century.