Columbia subject headings:
Concord.
Philosophy, Russian--History.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Harvard subject headings:
Berdi︠a︡ev, Nikolaĭ, 1874-1948
Bulgakov, Sergiĭ, 1871-1944.
Church--Catholicity
Concord.
Florenskiĭ, P. A. (Pavel Aleksandrovich), 1882-1937
Ivanov, V. I. (Vi︠a︡cheslav Ivanovich), 1866-1949
Khomi︠a︡kov, A. S. (Alekseĭ Stepanovich), 1804-1860
Philosophy, Russian--History.
Rozanov, V. V. (Vasiliĭ Vasilʹevich), 1856-1919
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines.
Solovyov, Vladimir Sergeyevich, 1853-1900
Trubet︠s︡koĭ, S. N. (Sergeĭ Nikolaevich), kni︠a︡zʹ, 1862-1905.
Princeton subject headings: