Columbia subject headings:
Church Slavic philology--History.
Cyril, Saint, Apostle of the Slavs, approximately 827-869.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885.
Philologists--Slavic countries--Biography.
Harvard subject headings:
Cyril, Saint, Apostle of the Slavs, approximately 827-869.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885.
Princeton subject headings:
Cyril, Saint, Apostle of the Slavs, approximately 827-869.
Cyrillic alphabet.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885.