Columbia subject headings:
Excavations (Archaeology)--Germany--Ulm.
Fortification--Germany--Ulm.
Ulm (Germany)--Antiquities.
Harvard subject headings:
Excavations (Archaeology)--Germany--Ulm.
Fortification--Germany--Ulm.
Ulm (Germany)--Antiquities.
Princeton subject headings:
Excavations (Archaeology)--Germany--Ulm Region.
Fortification--Germany--Ulm Region.
Ulm Region (Germany)--Antiquities.
Ulm Region (Germany)--History, Military.