Columbia subject headings:
Soviet Union--Politics and government.
T︠S︡K KPSS. Politbi︠u︡ro--History.
Harvard subject headings:
Soviet Union--Politics and government--1917-1936.
T︠S︡K KPSS. Politbi︠u︡ro--History.
Princeton subject headings:
Soviet Union--Politics and government.
T︠S︡K KPSS. Politbi︠u︡ro--History.