Columbia subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.
Harvard subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.
Princeton subject headings:
Orthodox Eastern Church--Russia (Federation)--History--20th century.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.