Columbia subject headings:
Harvard subject headings:
Chief executive officers--Germany--Biography.
Conglomerate corporations--Germany--History.
International business enterprises--Germany--History.
Siemens Aktiengesellschaft--History.
Princeton subject headings:
Chief executive officers--Germany--Biography.
Conglomerate corporations--Germany--History.
International business enterprises--Germany--History.
Siemens Aktiengesellschaft--History.