Columbia subject headings:
Harvard subject headings:
Bridges--Design and construction--History.
Civil engineering--Germany--History.
Civil engineers--Germany--Biography.
Köpcke, Claus, 1831-1911.
Princeton subject headings:
Bridges--Design and construction--History.
Civil engineering--Germany--History.
Civil engineers--Germany--Biography.
Köpcke, Claus, 1831-1911.