Columbia subject headings:
Communism--Soviet Union.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za.
Social classes--Soviet Union.
Harvard subject headings:
Communism--Soviet Union
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za.
Social classes--Soviet Union
Princeton subject headings: