Columbia subject headings:
Russia--History--February Revolution, 1917.
Soviet Union--Politics and government--1917-1936.
Harvard subject headings:
Petrogradskiĭ Sovet rabochikh i krasnoarmeĭskikh deputatov.
Russia--History--February Revolution, 1917.
Russia--Politics and government--1894-1917.
Russia. Gosudarstvennai︠a︡ Duma (4th : 1912-1917)
Princeton subject headings:
Russia--History--February Revolution, 1917.