Columbia subject headings:
Protest movements--Soviet Union--History--Sources.
Soviet Union--History--1917-1936--Sources.
Soviet Union--History--Revolution, 1917-1921--Protest movements--Sources.
Harvard subject headings:
Protest movements--Soviet Union--History--Sources.
Soviet Union--History--1917-1936--Sources.
Soviet Union--History--Revolution, 1917-1921--Protest movements--Sources.
Princeton subject headings:
Protest movements--Soviet Union--History--Sources.
Soviet Union--History--1917-1936--Sources.
Soviet Union--History--Revolution, 1917-1921--Protest movements--Sources.