Columbia subject headings:
Harvard subject headings:
Germany--History--Revolution, 1918
Kiel (Germany)--History--20th century.
Labor unions--Germany--History--20th century
Sailors--Germany--Kiel--History--20th century.
Strikes and lockouts--Germany--History--20th century.
Princeton subject headings:
Germany--History--Revolution, 1918.
Labor unions--Germany--History.
Strikes and lockouts--Sailors--Germany--History.