Columbia subject headings:
Germany--Economic conditions--1918-1945.
Hitler, Adolf, 1889-1945--Friends and associates.
Industrialists--Germany--Biography.
Industrialists--Germany--Ruhr (Region)--Biography.
National socialism--Economic aspects.
Thyssen, Fritz, 1873-1951.
Harvard subject headings:
Germany--Economic conditions--1918-1945.
Hitler, Adolf, 1889-1945--Friends and associates.
Industrialists--Germany--Biography
Industrialists--Germany--Ruhr (Region)--Biography.
National socialism--Economic aspects.
Thyssen, Fritz, 1873-1951.
Princeton subject headings:
Germany--History--1933-1945.
Hitler, Adolf, 1889-1945--Friends and associates.
Industrialists--Germany--Ruhr (Region)--Biography.
Theis family.
Thyssen, Fritz, 1873-1951.