Columbia subject headings:
Harvard subject headings:
Businesspeople--Germany--Biography.
Electric industries--Germany--History.
Family-owned business enterprises--Germany--History.
Germans--Russia--Biography.
Siemens & Halske--History.
Siemens, Carl von, 1829-1906.
Telegraph--Germany--History.
Princeton subject headings:
Industrialists--Germany--Biography.
Siemens & Halske.
Siemens Aktiengesellschaft--History.
Siemens, Carl von, 1829-1906.