Columbia subject headings:
Harvard subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History.
Princeton subject headings:
Orthodox Eastern Church--Doctrines.
Orthodox Eastern Church--Government.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ.