Columbia subject headings:
Balkan Peninsula--Civilization--Congresses.
Civilization, Slavic--Congresses.
Slavic countries--Ethnic relations--History--Congresses.
Slavic countries--Historiography--Congresses.
Slavic countries--History--Congresses.
Harvard subject headings:
Byzantine Empire--Civilization--Congresses.
Byzantine Empire--Relations--Slavic countries--Congresses.
Civilization, Slavic--Byzantine influences--Congresses.
Civilization, Slavic--Congresses.
Slavic countries--Relations--Byzantine Empire--Congresses.
Princeton subject headings:
Byzantine Empire--Relations--Slavic countries--Congresses.
Civilization, Byzantine--Congresses.
Civilization, Slavic--Congresses.
Slavic countries--Relations--Byzantine Empire--Congresses.