Columbia subject headings:
Poland--Economic conditions--1945-
Poland--Politics and government--1989-
Poland--Social conditions.
Harvard subject headings:
Poland--Economic conditions--1945-
Poland--Economic conditions--1981-1990
Poland--Politics and government--1980-1989
Poland--Social conditions--1945-
Poland--Social conditions--1980-1989
Princeton subject headings:
Poland--Economic conditions--1945-
Poland--Politics and government--1945-.
Poland--Social conditions--1945-