Columbia subject headings:
Architecture, Domestic--Germany.
City planning--Germany--History.
Railroads--Germany.
Harvard subject headings:
City planning--Germany--History--19th century.
City planning--Germany--History--20th century.
Railroads--Germany
Urbanization--Germany--History.
Princeton subject headings:
Architecture, Domestic--Germany.
City planning--Germany--History.
Railroads--Germany.