Columbia subject headings:
Harvard subject headings:
Berdi︠a︡ev, Nikolaĭ, 1874-1948
Bulgakov, Sergiĭ, 1871-1944.
Religion--Philosophy--History--19th century
Solovyov, Vladimir Sergeyevich, 1853-1900
Princeton subject headings:
Berdi︠a︡ev, Nikolaĭ, 1874-1948.
Bulgakov, Sergiĭ, 1871-1944.
Religion--Philosophy--History--19th century.
Solovyov, Vladimir Sergeyevich, 1853-1900.