Columbia subject headings:
Church music--Russia--History.
Church music--Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History.
Church music--Ukraine--History.
Harvard subject headings:
Byzantine chants--History and criticism.
Church music--Russia.
Church music--Ukraine.
Music--Russia--History and criticism
Music--Ukraine--History and criticism
Princeton subject headings:
Church music--Russia--History.
Church music--Ukraine--History.