Columbia subject headings:
NSZZ "Solidarność" (Labor organization)--History--Sources.
Working class--Political activity--Poland.
Harvard subject headings:
NSZZ "Solidarność" (Labor organization)
Princeton subject headings:
Labor movement--Poland--History--20th century--Sources.
Labor unions--Poland--History--Sources.
NSZZ "Solidarność" (Labor organization)--History--Sources.
Poland--Politics and government--1980-1989--Sources.