Columbia subject headings:
Harvard subject headings:
Anti-communist movements--Poland--History--20th century.
Poland. Korpus Bezpieczeństwa Wewnętrznego--History.
Police--Poland--History--20th century.
Princeton subject headings:
Anti-communist movements--Poland.
Internal security--Poland--History--20th century.
Poland. Korpus Bezpieczeństwa Wewnętrznego