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