Columbia subject headings:
Civilization--Philosophy.
Philosophy and religion.
Harvard subject headings:
Civilization--Philosophy
Gershenzon, M. O. (Mikhail Osipovich), 1869-1925--Correspondence.
Ivanov, V. I. (Vi︠a︡cheslav Ivanovich), 1866-1949--Correspondence.
Philosophy and religion.
Princeton subject headings:
Civilization--Philosophy.
Gershenzon, M. O. (Mikhail Osipovich), 1869-1925--Correspondence.
Ivanov, V. I. (Vi︠a︡cheslav Ivanovich), 1866-1949--Correspondence.
Philosophy and religion.