Columbia subject headings:
Labor movement--Political activity--Poland.
Labor unions--Political activity--Poland.
Strikes and lockouts--Poland.
Harvard subject headings:
Labor unions--Poland
Poland--History--1945-1980
Poland--History--1980-
Radio Free Europe.
Strikes and lockouts--Poland
Princeton subject headings:
Labor unions and communism--Poland.
Labor unions--Poland--History.
Poland--Politics and government--1945-.
Strikes and lockouts--Poland.