Columbia subject headings:
Communists--Soviet Union.
Severnyĭ rabochiĭ soi͡uz.
Harvard subject headings:
Communism--Soviet Union
Severnyĭ rabochiĭ soi︠u︡z.
Princeton subject headings:
Communism--Soviet Union.
Severnyĭ rabochiĭ soi︠u︡z.