Columbia subject headings:
Harvard subject headings:
Berdi︠a︡ev, Nikolaĭ, 1874-1948
Existentialism.
Gnosticism
Philosophy, Russian--20th century.
Princeton subject headings:
Berdi︠a︡ev, Nikolaĭ, 1874-1948.
Existentialism.
Gnosticism.
Philosophy, Russian--20th century.