Columbia subject headings:
Industries Labor.
Land use.
NSZZ "Solidarność" (Labor organization)--History.
Harvard subject headings:
Martial law--Poland--History--20th century.
NSZZ "Solidarność" (Labor organization)--History.
Princeton subject headings:
NSZZ "Solidarność" (Labor organization)--History.
Poland--Politics and government--20th century.
Propaganda, Communist--Poland--History.