Columbia subject headings:
Harvard subject headings:
Civilization--Philosophy
Frank, S. L. (Semen Li︠u︡dvigovich), 1877-1950
Knowledge, Theory of
Philosophers--Russia--Biography
Philosophy, Russian--20th century
Religion--Philosophy
Princeton subject headings:
Frank, S. L. (Semen Li︠u︡dvigovich), 1877-1950.
Philosophers--Russia--Biography.
Philosophy, Russian--19th century.
Philosophy, Russian--20th century.