Columbia subject headings:
Karakalpakstan (Uzbekistan)--History--20th century.
Khorazm oblasti (Uzbekistan)--History--20th century.
Harvard subject headings:
Karakalpakstan (Uzbekistan)--History.
Khorazm oblasti (Uzbekistan)--History.
Princeton subject headings:
Karakalpakstan (Uzbekistan)--History--20th century.
Khorazm oblasti (Uzbekistan)--History--20th century.