Columbia subject headings:
Harvard subject headings:
Agriculture--Uzbekistan--Khorazm oblasti--History--19th century.
Khorazm oblasti (Uzbekistan)--Economic conditions.
Princeton subject headings:
Agriculture--Uzbekistan--Khorezmskai︠a︡ oblastʹ--History.
Irrigation--Uzbekistan--Khorezmskai︠a︡ oblastʹ--History.
Khorazm oblasti (Uzbekistan)--Social life and customs.