Columbia subject headings:
Harvard subject headings:
Poland--Economic conditions--1945-1981
Poland--Economic conditions--1981-1990
Poland--Politics and government--1980-1989
Polska Zjednoczona Partia Robotnicza.
Princeton subject headings:
Communism and society.
Communism--Poland--History--20th century.
Poland--Economic conditions--1945-
Poland--Politics and government--1945-1980.
Poland--Politics and government--1980-1989.
Poland--Social conditions--1945-
Polska Zjednoczona Partia Robotnicza--History.