Konstantin-Filosof i Mefodii nachalʹnye glavy iz istorii slavianskoi pisʹmennosti
Bernshtein, S. B.(Samuil Borisovich)
Moskva Izd-vo Moskovskogo un-ta
1984
Bibliography: p158-162 - Includes index
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885.
Cyril, Saint, Apostle of the Slavs, approximately 827-869.