Columbia subject headings:
Russia--Politics and government--1904-1914.
Russia--Social conditions--1801-1917.
Working class--Soviet Union--History.
Harvard subject headings:
Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡--History--20th century.
Working class--Political activity--Russia--History--20th century.
Working class--Russia--History--20th century.
Working class--Soviet Union--History--20th century.
Working class--Soviet Union--Political activity--History--20th century.
Princeton subject headings:
Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡--History--20th century.
Working class--Russia--History--20th century.
Working class--Russia--Political activity--History--20th century.