Columbia subject headings:
Russia (Federation)--Relations--Ukraine.
Russia--History--Philosophy.
Soviet Union--History--Philosophy.
Ukraine--Relations--Russia (Federation)
Harvard subject headings:
Princeton subject headings:
Kievan Rus--History--Religious aspects.
Kievan Rus--History.
Russia (Federation)--History--Religious aspects.
Russia (Federation)--History.
Russia--History--Religious aspects.
Russia--History.
Soviet Union--History--Religious aspects.
Soviet Union--History.
Ukraine--History.