Columbia subject headings:
Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡--History.
Soviet Union--History--Revolution, 1917-1921.
Soviet Union--Politics and government--1917-1936.
Harvard subject headings:
Mensheviks--Soviet Union.
Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡.
Soviet Union--Politics and government--1917-1936.
Princeton subject headings:
Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡--History.
Soviet Union--History--Revolution, 1917-1921.
Soviet Union--Politics and government--1917-1936.