Columbia subject headings:
Architecture, German--20th century.
City planning--Germany--History--20th century.
Hillebrecht, Rudolf.
Regional planning--Germany--History--20th century.
Harvard subject headings:
Architecture, German--20th century.
City planning--Germany--History--20th century.
Hillebrecht, Rudolf
Regional planning--Germany--History--20th century.
Princeton subject headings:
Architecture, German--20th century.
City planning--Germany--History--20th century.
Hillebrecht, Rudolf.
Regional planning--Germany--History--20th century.