Columbia subject headings:
Harvard subject headings:
Religious thought--Russia.
Russia (Federation)--Religion.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History.
Princeton subject headings:
Religious thought--Russia--History.
Russia (Federation)--Religion.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History.