Columbia subject headings:
Harvard subject headings:
Mysticism--Russia.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Princeton subject headings:
Mysticism--Russia.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.