Columbia subject headings:
Church Slavic language--Bulgarian recension.
Church Slavic language--Orthography and spelling.
Church Slavic language--Russian recension--History.
Moskovskiĭ Spaso-Andronikov monastyrʹ.
Paleography, Church Slavic--Russia (Federation)--Moscow.
Harvard subject headings:
Russian language--Foreign elements--Slavic languages, Southern.
Slavic languages, Southern--Influence on Russian.
Princeton subject headings: