Columbia subject headings:
Harvard subject headings:
Barracks--Europe--History.
Barracks.
Bunkers (Fortification)
Bunkers (Fortification)--Europe--History.
Cold War--Territorial questions.
Europe--Boundaries--History.
Voyages and travels
Princeton subject headings:
Barracks--Europe--History.
Barracks.
Bunkers (Fortification)
Bunkers (Fortification)--Europe--History.
Cold War--Territorial questions.
Europe--Boundaries--History.
Voyages and travels.