Columbia subject headings:
Poland--Politics and government--1945-1980.
Strikes and lockouts--Poland.
Harvard subject headings:
Poland--Politics and government--1945-1980
Strikes and lockouts--Poland
Strikes and lockouts--Poland--Gdańsk.
Princeton subject headings:
Labor movement--Poland--Gdańsk.
Poland--Politics and government--1945-1980.
Strikes and lockouts--Poland--Gdańsk.