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