Columbia subject headings:
Poland--Foreign relations--1945-
Poland--Relations.
Harvard subject headings:
Poland--Foreign relations--1945-
Poland--Foreign relations--1945-1989
Poland--Relations
Poland--Relations.
Princeton subject headings:
Poland--Economic conditions--1945-
Poland--Economic policy--1966-1980.
Poland--Economic policy--1981-1990.
Poland--Foreign relations--1945-