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