Columbia subject headings:
Revolutionaries--Russia--Biography.
Russia--Politics and government--1894-1917.
Soviet Union--Politics and government--1917-1936.
Harvard subject headings:
Revolutionaries--Russia--Biography
Revolutionaries--Russia--Correspondence
Russia--Politics and government--1894-1917.
Soviet Union--Politics and government--1917-1936.
Princeton subject headings:
Revolutionaries--Russia--Biography.
Russia--Politics and government--1894-1917.
Soviet Union--Politics and government--1917-1936.