Columbia subject headings:
Harvard subject headings:
Harbors--Germany--History.
Industrial relations--Germany--History.
Labor disputes--Germany--History.
Stevedores--Germany--Social conditions.
Stevedores--Labor unions--Germany.
Strikes and lockouts--Stevedores--Germany.
Princeton subject headings:
Harbors--Germany--History.
Industrial relations--Germany--History.
Labor disputes--Germany--History.
Stevedores--Germany--Social conditions.
Stevedores--Labor unions--Germany.
Strikes and lockouts--Stevedores--Germany.