Columbia subject headings:
Harvard subject headings:
Communists--Germany--Biography
Germany--History--Revolution, 1918.
Germany. Kriegsmarine--History--20th century.
Knüfken, Hermann, 1893-1976.
Mutiny--Germany--History--20th century.
Revolutionaries--Germany--History--20th century.
Sailors--Germany--Biography
Princeton subject headings:
Communists--Germany--Biography.
Knüfken, Hermann, 1893-1976.
Revolutionaries, German--Biography.
Sailors--Germany--Biography.