Columbia subject headings:
Agriculture--Ukraine.
Ukraine--History--Revolution, 1917-1921.
Ukraïnsʹka tsentralʹna rada.
Harvard subject headings:
Princeton subject headings:
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za--History.
Ukraine--History--Revolution, 1917-1921.