Columbia subject headings:
Architects--Germany.
Architecture--Germany--History--20th century.
Hämer, Hardt-Waltherr--Criticism and interpretation.
Harvard subject headings:
Architects--Germany
Architecture--Germany--History--20th century
City planners--Germany.
City planning--Germany--History--20th century.
Hämer, Hardt-Waltherr.
Urban renewal--Germany--Berlin
Princeton subject headings: