Columbia subject headings:
Harvard subject headings:
Germany--History--1918-1933.
Germany--History--Revolution, 1918.
Gumbel, Emil Julius, 1891- Vier Jahre politischer Mord.
Political crimes and offenses--Germany
Princeton subject headings:
Germany--History--1918-1933.
Germany--History--Revolution, 1918.
Gumbel, Emil Julius, 1891-1966. Vier Jahre politischer Mord.
Justice, Administration of--Germany.
Political crimes and offenses--Germany.