Columbia subject headings:
Collective bargaining--Poland--History--Sources.
Labor policy--Poland--History--Sources.
NSZZ "Solidarność" (Labor organization)--History--Sources.
Harvard subject headings:
Collective bargaining--Poland--History--Sources.
Labor policy--Poland--History--Sources.
NSZZ "Solidarność" (Labor organization)--History--Sources.
Princeton subject headings: