Columbia subject headings:
Harvard subject headings:
Businessmen--Germany--Biography
Germany--Economic conditions--1918-1945.
Industrialists--Germany--Biography
National socialism--Economic aspects.
Steel industry and trade--Germany--Mülheim an der Ruhr--History.
Thyssen & Co. (Mülheim an der Ruhr, Germany)
Thyssen, Fritz, 1873-1951.
Thyssen-Bornemisza, Heinrich, Baron.
Princeton subject headings:
Industrialists--Germany--Biography.
Steel industry and trade--Germany--Mülheim an der Ruhr--History.
Thyssen, Fritz, 1873-1951--Biography.
Thyssen-Bornemisza, Heinrich, Baron--Biography.