Columbia subject headings:
Harvard subject headings:
Cyril, Saint, Apostle of the Slavs, approximately 827-869.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885.
Missions--History--Early church, ca. 30-600
Missions--History--Middle Ages, 600-1500
Orthodox Eastern Church--Missions--History.
Orthodox Eastern monasticism and religious orders--History.
Princeton subject headings:
Cyril, Saint, Apostle of the Slavs, approximately 827-869.
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885.
Missions--History--Early church, ca. 30-600.
Missions--History--Middle Ages, 600-1500.
Orthodox Eastern Church--Missions--History.
Orthodox Eastern monasticism and religious orders--History.