Columbia subject headings:
Poland--History--1980-1989--Congresses.
Poland--Politics and government--1980-1989--Congresses.
Poland--Politics and government--1980-1989--Sources.
Harvard subject headings:
Communism--Europe, Eastern--History--20th century--Congresses.
Communism--Poland--History--20th century--Congresses.
Europe, Eastern--Politics and government--1945-1989--Congresses.
Poland--Politics and government--1980-1989--Congresses.
Poland--Politics and government--1980-1989--Sources.
Princeton subject headings: