Columbia subject headings:
College teachers--Soviet Union--Biography.
Historians--Soviet Union--Biography.
Okunʹ, S. B. (Semen Bent︠s︡ianovich)
Harvard subject headings:
Princeton subject headings:
Historians--Russia--Biography.
Okunʹ, S. B. (Semen Bent︠s︡ianovich)
Russia--Historiography.