Columbia subject headings:
Harvard subject headings:
Burg Friedstrom (Zons, Germany)
Excavations (Archaeology)--Germany--Zons.
Zons (Germany)--Antiquities.
Princeton subject headings:
Architecture, Medieval--Germany--Zons.
Burg Friedestrom (Zons, Germany)
Excavations (Archaeology)--Germany--Zons.
Pottery, Medieval--Germany--Zons.
Zons (Germany)--Antiquities.