Columbia subject headings:
Political persecution--Kazakhstan--History--20th century.
Political persecution--Soviet Union--History--20th century.
Political prisoners--Kazakhstan--Biography.
Political prisoners--Soviet Union--Biography.
Harvard subject headings:
Political persecution--Kazakhstan--History--20th century.
Political persecution--Soviet Union--History--20th century.
Political persecution--Soviet Union--History.
Political prisoners--Kazakhstan--Biography.
Political prisoners--Soviet Union--Biography
Princeton subject headings: