Columbia subject headings:
Orthodox Eastern Church--Russia (Federation)--Apologetic works.
Orthodox Eastern Church--Russia (Federation)--Doctrines.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Apologetic works.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Harvard subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Apologetic works.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Princeton subject headings: