Columbia subject headings:
Architecture--Conservation and restoration--Germany (East)
Architecture--Germany (East)
Architecture--Germany (East)--History--20th century.
Harvard subject headings:
Architecture, Modern--20th century--Germany (East)
Architecture--Conservation and restoration--Germany (East)
Architecture--Germany (East)
Architecture--Germany (East)--Conservation and restoration.
Architecture--Germany (East)--History.
Princeton subject headings: