Title: Bogosluzhebnii͡at chin, preveden ot sv. brati͡a Kiril i Metodiĭ v nachaloto na ti͡akhnata Moravska misii͡a
Subjects: Liturgy, Texts, History and criticism, Missions, Orthodox Eastern Church
People: Cyril Saint, Apostle of the Slavs (approximately 827-869), Methodius Saint, Apostle of the Slavs (approximately 825-884 or 885)