Columbia subject headings:
Soviet Union--History--Revolution, 1917-1921.
Youth movements--Soviet Union--History.
Harvard subject headings:
Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡.
Sotsialisticheskii soiuz rabochei molodezhi.
Soviet Union--History--Revolution, 1917-1921.
Youth movements--Soviet Union--History.
Princeton subject headings: