Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Germany--Schaumburg (Grafschaft)
Fortification--Germany--Schaumburg (Grafschaft)
Military camps--Germany--Schaumburg (Grafschaft)--History.
Schaumburg (Grafschaft)--History.
Princeton subject headings:
Excavations (Archaeology)--Germany--Schaumburg (Grafschaft).
Fortification--Germany--Schaumburg (Grafschaft).
Military camps--Germany--Schaumburg (Grafschaft)--History.
Schaumburg (Grafschaft)--History.