Columbia subject headings:
Nazi concentration camps--Poland--Silesia (Voivodeship)--History--20th century.
Poland--Politics and government--1945-1980.
Political prisoners--Poland--Silesia (Voivodeship)--History--20th century.
Harvard subject headings:
Internment camps--Silesia, Upper (Poland and Czech Republic)--History--20th century.
Poland--Politics and government--1945-1980
Political prisoners--Silesia, Upper (Poland and Czech Republic)--History--20th century.
Princeton subject headings: