Title: O pervoĭ slavi︠a︡nskoĭ azbuke, ee proiskhozhdenii i strukturnykh osobennosti︠a︡kh
Subjects: Glagolitic alphabet, History, Cyrillic alphabet
People: Cyril Saint, Apostle of the Slavs (approximately 827-869), Methodius Saint, Apostle of the Slavs (approximately 825-884 or 885)