Columbia subject headings:
Harvard subject headings:
Bunkers (Fortification)--Germany--Berlin--History.
Bunkers (Fortification)--Germany--Bonn--History.
Kanzlerbungalow (Bonn, Germany)
Official residences--Germany--Berlin--Design and construction--History.
Official residences--Germany--Berlin--History.
Official residences--Germany--Bonn--Design and construction--History.
Official residences--Germany--Bonn--History.
Underground architecture--Germany--Berlin--History.
Underground architecture--Germany--Bonn--History.
Underground construction--History.
Princeton subject headings:
Bunkers (Fortification)--Germany--Berlin--History.
Bunkers (Fortification)--Germany--Bonn--History.
Kanzlerbungalow (Bonn, Germany)
Official residences--Germany--Berlin--Design and construction--History.
Official residences--Germany--Berlin--History.
Official residences--Germany--Bonn--Design and construction--History.
Official residences--Germany--Bonn--History.
Underground architecture--Germany--Berlin--History.
Underground architecture--Germany--Bonn--History.
Underground construction--History.