Columbia subject headings:
Civilization, Slavic--Congresses.
Cyril, Saint, Apostle of the Slavs, approximately 827-869--Influence--Congresses.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885--Influence--Congresses.
Slavic philology--Congresses.
Harvard subject headings:
Civilization, Slavic--History--Congresses.
Cyril, Saint, Apostle of the Slavs, approximately 827-869--Influence.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885--Influence.
Princeton subject headings:
Civilization, Slavic--Congresses.
Cyril, Saint, Apostle of the Slavs, approximately 827-869--Influence--Congresses.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885--Influence--Congresses.
Slavic philology--Congresses.