Columbia subject headings:
Ukraine--Economic conditions.
Ukraine--Politics and government--1917-1945.
Working class--Ukraine.
Harvard subject headings:
Ukraine--History--Revolution, 1917-1921.
Ukraine. T͡Sentralʹna Rada.
Working class--Political activity--Ukraine--History.
Working class--Ukraine--History--20th century.
Working class--Ukraine--Political activity--History.
Princeton subject headings:
Ukraine--History--Revolution, 1917-1921.
Ukraine. T︠S︡entralʹna Rada
Working class--Ukraine--History--20th century.
Working class--Ukraine--Political activity--History.