Columbia subject headings:
Europe, Western--Relations--Kievan Rus--Congresses.
Kievan Rus--History--Congresses.
Kievan Rus--Relations--Europe, Western--Congresses.
Kieven Rus--Civilization--Congresses.
Harvard subject headings:
Europe--Relations--Kievan Rus--Congresses.
Europe--Relations--Russia--Congresses.
Kievan Rus--Civilization--Congresses.
Kievan Rus--History--Congresses.
Kievan Rus--Relations--Europe--Congresses.
Russia--Civilization--Congresses.
Russia--History--Congresses.
Russia--Relations--Europe--Congresses.
Princeton subject headings:
Europe--Relations--Kievan Rus--Congresses.
Europe--Relations--Russia--Congresses.
Kievan Rus--Civilization--Congresses.
Kievan Rus--History--Congresses.
Kievan Rus--Relations--Europe--Congresses.
Russia--Civilization--Congresses.
Russia--History--Congresses.
Russia--Relations--Europe--Congresses.