Columbia subject headings:
Danewerk (Schleswig-Holstein, Germany)--History--19th century.
Excavations (Archaeology)--Germany--Schleswig-Holstein--History--19th century.
Northmen--Germany--Schleswig-Holstein.
Schleswig-Holstein (Germany)--Antiquities.
Harvard subject headings:
Danewerk (Schleswig-Holstein, Germany)--History--19th century.
Excavations (Archaeology)--Germany--Schleswig-Holstein--History--19th century.
Northmen--Germany--Schleswig-Holstein.
Schleswig-Holstein (Germany)--Antiquities.
Princeton subject headings:
Danewerk (Fortification)
Excavations (Archaeology)--Germany--Schleswig.
Fortification--Germany--Schleswig.
Schleswig (Germany)--Antiquities.