Columbia subject headings:
Harvard subject headings:
Czechoslovakia--Politics and government--1968---Sources--Periodicals.
Poland--Politics and government--1945-1980--Sources--Periodicals.
Poland--Politics and government--1980-1989--Sources--Periodicals.
Princeton subject headings:
Czechoslovakia--Politics and government--1968-1989--Sources--Periodicals.
Poland--Politics and government--1945-1980--Sources--Periodicals.
Poland--Politics and government--1980-1989--Sources--Periodicals.