Columbia subject headings:
Harvard subject headings:
Business enterprises--Germany--History--19th century.
Businesspeople--Germany--Biography.
Electrical engineering--Germany--History--19th century.
Electrical engineers--Germany--Biography.
Siemens, Werner von, 1816-1892.
Princeton subject headings:
Business enterprises--Germany--History--19th century.
Businesspeople--Germany--Biography.
Electrical engineering--Germany--History--19th century.
Electrical engineers--Germany--Biography.
Siemens, Werner von, 1816-1892.