Columbia subject headings:
NSZZ "Solidarność" (Labor organization)
Social conflict.
Working class--Political activity--Poland.
Harvard subject headings:
Communism--Poland
NSZZ "Solidarność" (Labor organization)
Poland--Social conditions--1945-
Social classes--Poland
Social conflict--Poland.
Working class--Poland--Political activity.
Working class--Political activity--Poland.
Princeton subject headings: