Columbia subject headings:
Intelligence service--Poland--Sources.
Internal security--Poland--Sources.
Poland--Politics and government--1945-1980--Sources.
Poland. Służba Bezpieczeństwa--History--Sources.
Harvard subject headings:
Princeton subject headings:
Intelligence service--Poland.
Internal security--Poland.
Poland--Politics and government--1945-1980.
Poland. Ministerstwo Bezpieństwa Publicznego--History.