Columbia subject headings:
NSZZ "Solidarność" (Labor organization)--History--Chronology.
Poland--Politics and government--1980-1989--Chronology.
Harvard subject headings:
Labor unions--Political activity--Poland
NSZZ "Solidarność" (Labor organization)--History--Chronology.
NSZZ "Solidarność" (Labor organization)--History.
Poland--Politics and government--1980-1989
Poland--Politics and government--1980-1989--Chronology.
Princeton subject headings:
Labor unions--Political activity--Poland.
NSZZ "Solidarność" (Labor organization)--History--Chronology.
Poland--Politics and government--1980-1989--Chronology.