Columbia subject headings:
Harvard subject headings:
Agriculture--Germany--Sylt.
Excavations (Archaeology)--Germany--Sylt.
Germany--Antiquities.
Plant remains (Archaeology)--Germany--Sylt.
Sylt (Germany)--Antiquities.
Princeton subject headings:
Geology--Germany (West)--Schleswig-Holstein--History.
Schleswig-Holstein (Germany)--Antiquities.