Columbia subject headings:
Architects--Germany--Hamburg.
Architecture--Germany--Hamburg--History--20th century.
City planners--Germany--Hamburg.
City planning--Germany--Hamburg--History--20th century.
Hamburg (Germany)--Buildings, structures, etc.
Hamburg-Altona (Hamburg, Germany)--Buildings, structures, etc.
Oelsner, Gustav, 1879-1956.
Harvard subject headings:
Architects--Germany--Hamburg.
Architecture--Germany--History--20th century
City planners--Germany--History--20th century.
City planning--History--20th century
Oelsner, Gustav, 1879-1956.
Princeton subject headings: