Columbia subject headings:
Feudalism--Kievan Rus--History.
Feudalism--Russia--History.
Kievan Rus--Historiography.
Harvard subject headings:
Historiography--Russia
Historiography--Soviet Union
Kievan Rus--Historiography.
Social structure--Kievan Rus.
Princeton subject headings:
Historiography--Russia.
Historiography--Soviet Union.
Kievan Rus--Historiography.
Social structure--Kievan Rus.