Kirilometodievska bibliografii︡a︠, 1940-1980
Duĭchev, Ivan.
Kirmagova, A.
Paunova, A.
Sofii︡a︠ Sofiĭski universitet "Kliment Okhridski," Universitetska biblioteka
1983
Includes index
Cyril, Saint, Apostle of the Slavs, approximately 827-869
Methodius, Saint, Apostle of the Slavs, approximately 825-884 or 885
Church Slavic philology