Columbia subject headings:
Harvard subject headings:
Aufhäuser, Siegfried, 1884-1969.
Labor leaders--Germany--Biography.
Labor movement--Germany--History--20th century
Labor unions--Germany--Biography.
Politicians--Germany--Biography
Princeton subject headings:
Aufhäuser, Siegfried, 1884-1969.
Labor movement--Germany--History--20th century.
Labor unions--Germany--Biography.