Columbia subject headings:
Church Slavic language.
Manuscripts, Church Slavic.
Harvard subject headings:
Hymns, Russian--History and criticism.
Kievan Rus--Church history.
Manuscripts, Church Slavic--History.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Liturgy--History.
Princeton subject headings:
Church Slavic language.
Manuscripts, Church Slavic.