Columbia subject headings:
Harvard subject headings:
Anti-communist movements--Poland--History--20th century.
Labor unions--Poland--History--20th century.
NSZZ "Solidarność" (Labor organization)--History.
Poland--History--1980-1989
Poland--Politics and government--1980-1989
Revolutions--Poland--History--20th century.
Social conflict--Poland--History--20th century.
Princeton subject headings:
Labor movement--Poland.
NSZZ "Solidarność" (Labor organization)
Poland--Politics and government--1989-
Strikes and lockouts--Poland--History--20th century.